320 + Mcqs in Pipes And Cistern Page 5 McqOptions

201.	Water flows into a tank which is 200 m long and 150 m wide, through a pipe of cross-section (0.3m x 0.2m) at 20 km/h. In what time will the water level be 12m Â ?
A.	200 hrs
B.	240 hrs
C.	300 hrs
D.	270 hrs
Answer» D. 270 hrs

Discussion

202.	Working together, pipes A and B can fill an empty tank in 10 hours. They worked together for 4 hours and then B stopped and A continued filling the tank till it was full. It took a total of 13 hours to fill the tank. How long would it take A to fill the empty tank alone?
A.	15 hours
B.	13 hours
C.	16 hours
D.	12 hours
Answer» B. 13 hours

Discussion

203.	Two taps X and Y can fill a tank in 15 hours and 20 hours respectively. If the two taps are opened at 2 p.m., then at what time (in p.m.) should the tap X be closed to completely fill the tank at exactly 2 a.m.?
A.	8
B.	7
C.	9
D.	10
Answer» B. 7

Discussion

204.	Two valves P and B can fill a sump in 37.5 minutes and 45 minutes respectively. Both valves are opened. The sump will be filled in just 30 minutes, if valve B is turned off after
A.	6 min
B.	9 min
C.	5 min
D.	10 min
Answer» C. 5 min

Discussion

205.	Two taps P and Q can fill a tank in 24 hours and 18 hours respectively. If the two taps are opened at 11 a.m., then at what time (in p.m.) should the tap P be closed to completely fill the tank at exactly 2 a.m.?
A.	5
B.	2
C.	3
D.	4
Answer» D. 4

Discussion

206.	Two pipes X and Y can fill an empty tank in 16 hours and 20 hours respectively. Pipe Z alone can empty the completely filled tank in 25 hours. Firstly both pipes X and Y are opened and after 6 hours pipe Z is also opened. What will be the total time (in hours) taken to completely fill the tank?_x005F_x000D_
A.	80/7
B.	67/7
C.	44283
D.	304/29
Answer» E.

Discussion

207.	Two pipes X and Y can individually fill a tank in 48 and 72 min respectively. If they are opened simultaneously, how long will it take for the tank to fill?Â _x005F_x000D_
A.	39.4 min
B.	28.8 min
C.	24 min
D.	60 min
Answer» C. 24 min

Discussion

208.	Two pipes, when working one at a time, can fill a cistern in 3 hhrs and 4 hrs, resp while a third pipe can drain the cistern empty in 8 hrs. All the three pipes were opened together when the cistern was 1/12 full. How long did it take for the cistern to be completely full?
A.	2 hrs
B.	1 hr 45 min
C.	2 hr 10 min
D.	2 hr 11 min
Answer» B. 1 hr 45 min

Discussion

209.	Two pipes P and Q can fill an empty tank in 25 hours and 20 hours respectively. Pipe R alone can empty the completely filled tank in 50 hours. Firstly both the pipes P and Q are opened and after 8 hours pipe R is also opened. What will be the total time (in hours) taken to completely fill the tank?_x005F_x000D_
A.	12
B.	10
C.	14
D.	13
Answer» B. 10

Discussion

210.	Two pipes, when working one at a time can fill a cistern in 2 hrs and 3 hrs, respectively while a third pipe can drain the cistern empty in 6 hrs. All the three pipes were opened together when the cistern was 1/6 full. How long will it take for the cistern to be completely full?
A.	1 hour
B.	1 hour 30 min
C.	1 hour 20 min
D.	1 hour 15 min
Answer» E.

Discussion

211.	Two pipes can fill a cistern in 28 and 21 hours respectively and an another pipe can empty 30 gallons of water per hour. All the three pipes working together can fill the empty cistern in 84 hours. What is the capacity (in gallons) of the cistern?_x005F_x000D_
A.	350
B.	450
C.	420
D.	480
Answer» D. 480

Discussion

212.	Two pipes A and B can separately fill a cistern in 60 min and 75 min respectively. There is a third pipe in the bottom of the cistern to empty it. If all the three pipes are simultaneously opened, then the cistern is full in 50 min. In how much time, the third pipe alone can empty the cistern ?
A.	85 min
B.	95 min
C.	105 min
D.	100 min
Answer» E.

Discussion

213.	Two pipes namely A,B can fill a sump in 25 minutes and half an hour respectively and a pipe C can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity off the tank is
A.	450 gallons
B.	300 gallons
C.	240 gallons
D.	600 gallons
Answer» B. 300 gallons

Discussion

214.	Two pipes fill a tank when working individually in 25 and 40 hours, respectively while a third pipe can drain the filled tank in 16 hours. If all the three pipes are turned on at the same time when the tank is empty, how long will it take to fill the tank completely ?
A.	2 days 1 hour
B.	16 days 16 hours
C.	1 day 7 hours
D.	15 days 18 hours
Answer» C. 1 day 7 hours

Discussion

215.	Two pipes A and B can fill a tank in 16 hrs and 12 hrs respectively. The capacity of theÂ tank is 240 liters. Both the pipes are opened simultaneously and closed after 2 hrs. How much more water need to fill the tank?
A.	70 lit
B.	170 lit
C.	90 lit
D.	190 lit
Answer» C. 90 lit

Discussion

216.	Two pipes A and B can separately fill a cistern in 10 and 15 minutes respectively. A person opens both the pipes together when the cistern should have been was full he finds the waste pipe open. He then closes the waste pipe and in another 3 minutes the cistern was full. In what time can the waste pipe empty the cistern when fill Â ?
A.	8.21 min
B.	8 min
C.	8.57 min
D.	8.49 min
Answer» D. 8.49 min

Discussion

217.	Two pipes A and B can fill an empty cistern in 18 and 27 hours, respectively. Pipe C can drain the entire cistern in 45 hours when no other pipe is in operation. Initially, when the cistern was empty Pipe A and Pipe C were turned on. After a few Pipe A was turned off and Pipe B was turned on instantly. In all, it took 55 hours to fill the cistern. For how many hours was Pipe B turned on?
A.	50
B.	45
C.	27
D.	30
Answer» C. 27

Discussion

218.	Two pipes A and B can fill an empty cistern in 32 and 48 hrs, respectively. Pipe C can drain the entire cistern in 64 hrs when no other pipe is in operation. Initially, when the cistern was empty Pipe A and Pipe C were turned on. After a few hrs, Pipe A was turned off and Pipe B was turned on instantly. In all it took 112 hrs to fill the cistern. For how many hrs was Pipe B turned on?
A.	72
B.	70
C.	77
D.	84
Answer» B. 70

Discussion

219.	Two pipes A and B can fill an empty cistern in 1.8 and 2.7 hours, respectively. Pipe C can drain the entireÂ cistern in 4.5 hours when no other pipe is in operation. Initially when the cistern was empty Pipe A andÂ Â Pipe C were turned on. After a few hours Pipe A was turned off and Pipe B was turned on instantly. In allÂ it took 5.5 hours to fill the cistern. For how many hours was Pipe B turned on?_x005F_x000D_
A.	5
B.	4.5
C.	3
D.
Answer» C. 3

Discussion

220.	Three taps A,B and C can fill a tank in 12,15 and 20 hours respectively. If A is open all the time and B ,C are open for one hour each alternatively, the tank will be full in:
A.	6 hrs
B.	20/3 hrs
C.	7 hrs
D.	15/2 hrs
Answer» D. 15/2 hrs

Discussion

221.	Two pipes A and B can fill a tank in 15 min and 20 min respectively. Both the pipes are opened together but after 4 min, pipe A is turned off. What is the total time required to fill the tank ?
A.	15 min 20 sec.
B.	16 min 40 sec.
C.	13 min 10 sec.
D.	14 min 40 sec.
Answer» E.

Discussion

222.	Three taps I, J and K can fill a tank in 20,30and 40 minutes respectively. All the taps are opened simultaneously and after 5 minutes tap A was closed and then after 6 minutes tab B was closed .At the moment a leak developed which can empty the full tank in 70 minutes. What is the total time taken for the completely full ?
A.	24.315 minutes
B.	26.166 minutes
C.	22.154 minutes
D.	24 minutes
Answer» C. 22.154 minutes

Discussion

223.	Two filling taps P and Q together can fill a tank with rate of 40 lit/min and 60 lit/min respectively in 8 min. If a waste tap can empty the filled tank in 32 min, then what is the rate of waste tap ?
A.	34 lit/min
B.	25 lit/min
C.	22 lit/min
D.	18 lit/min
Answer» C. 22 lit/min

Discussion

224.	There is an empty reservoir whose capacity is 30 litres. There is an inlet pipe which fills at 5 L/min and there is an outlet pipe which empties at 4 L/min. Both the pipes function alternately for 1 minute. Assuming that the inlet pipe is the first one to function, how much time will it take for the reservoir to be filled up to its capacity?
A.	49.5 min
B.	50 min
C.	51 min
D.	52 min
Answer» D. 52 min

Discussion

225.	The ratio of efficiencies of two filling pipes is 4 : 5. There is a third emptying pipe which efficiency is two third of the average efficiency of first two filling pipes can empty a filled tank in 36 minutes. In how much time both the filling pipes can fill the tank when it is empty?
A.	16 min
B.	12 min
C.	14 min
D.	20 min
Answer» C. 14 min

Discussion

226.	Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The number of hours taken by C alone to fill the tank is:
A.	10
B.	12
C.	14
D.	16
Answer» D. 16

Discussion

227.	Three pipe P, Q and R can fill a tank in 12 minutes, 18 minutesand 24 minutes respectively. The pipe R is closed 12 minutesbefore the tank is filled. In what time the tank is full?
A.	8 (5/13) hrs
B.	8 (4/13) hrs
C.	7 (4/13) hrs
D.	8 (6/13) hrs
Answer» C. 7 (4/13) hrs

Discussion

228.	Pipes A, B and C are attached to an empty cistern. While the first two can fill the cistern in 4 and 10 hrs, respectively, the third can drain the cistern, when filled, in 6 hrs. If all the three pipes are opened simultaneously when the cistern is half-full, how many hours will be needed to fill the cistern?
A.	44530
B.	60/11
C.	120/11
D.	90/11
Answer» B. 60/11

Discussion

229.	Taps X and Y can fill a tank in 30 and 40 minutes respectively.Tap Z can empty the filled tank in 60 minutes.If all the three taps are kept open for one minute each,how much time will the taps take to fill the tank?
A.	48min
B.	72min
C.	24min
D.	None of these
Answer» D. None of these

Discussion

230.	Sita's bucket has thrice the capacity as Ramu's bucket. It takes 60 turns for Sita's bucket to fill the empty drum. How many turns it will take for both the buckets of Sita's and Ramu's, having each turn together to fill the empty drum?
A.	45
B.	40
C.	50
D.	30
Answer» B. 40

Discussion

231.	Pipes A, B and C are attached to an empty cistern. While the first two can fill the cistern in 6.6 and 16.5Â hours respectively, the third can drain the cistern, when filled, in 9.9 hours. If all the three pipes areÂ opened simultaneously when the cistern is three-fifths full, how many hours will be needed to fill theÂ cistern?_x005F_x000D_ Â _x005F_x000D_
A.	3.5
B.	4
C.	3.6
D.	3.75
Answer» D. 3.75

Discussion

232.	Raghu's tanker can fill a cistern in 4 hours. After half the cistern is filled, three more similar tankers are opened. What is the total time taken to fillthe cistern completely?
A.	2h 30 min
B.	2h
C.	3h
D.	2h 40 min
Answer» B. 2h

Discussion

233.	Pipes A, B, and C are attached to an empty cistern. While the first two can fill the cistern in 4 and 10 hours, respectively, the third can drain the cistern, when filled, in 6 hours. If all the three pipes are opened simultaneously when the cistern is three-fifth full, how many hours will be needed to fill the cistern?
A.	36/11
B.	48/11
C.	60/11
D.	44524
Answer» E.

Discussion

234.	Pipes A and B, when working together, can fill an empty tank in 24 hours. They work together for 8Â hours and then B is stopped but A continued to work. It took a total of 28 hours to fill the tank. How longÂ would it take A to fill the empty tank alone?_x005F_x000D_
A.	30 hours
B.	29 hours
C.	28 hours
D.	31 hours
Answer» B. 29 hours

Discussion

235.	Pipes A and B, when working together, can fill an empty tank in 8 hours. If B is stopped after 2 hours, it will take a total of 11 hrs to fill the tank. How long would it take A to fill the empty tank alone?_x005F_x000D_
A.	15 hrs
B.	12 hrs
C.	13 hrs
D.	16 hrs
Answer» C. 13 hrs

Discussion

236.	Pipes A and C can fill an empty cistern in 7 and 10.5 hours, respectively while Pipe B can drain the filledÂ cistern in 5.25 hours. If the three pipes are turned on together when the cistern is empty, how manyÂ hours will it take for the cistern to be23full?_x005F_x000D_
A.	121
B.	12
C.	14
D.	15.75
Answer» D. 15.75

Discussion

237.	Pipes A and C can fill an empty cistern in 32 and 48 hrs, respectively while Pipe B can drain the filled cistern in 24hrs. If the three pipes are turned on together when the cistern is empty, how many hrs will it take for the cistern to be 2/3 full?
A.	96
B.	64
C.	72
D.	48
Answer» C. 72

Discussion

238.	Pipe A is an inlet pipe that can fill an empty cistern in 8.7 hours. Pipe B can drain a filled cistern in 5.8Â hours. When the cistern was filled the two pipes are opened one at a time for an hour each, starting withÂ Pipe B. How long will it take for the cistern to be empty?_x005F_x000D_
A.	32 hours 16 minutes
B.	30 hours 48 minutes_x005F_x000D_
C.	32 hours
D.	31 hours
Answer» C. 32 hours

Discussion

239.	Pipe A takes 4 hours to fill a tank. Pipe B takes 6 hours to empty the same tank when full. If both thepipes are opened at the same time when the tank is empty, how many hours will it take for the tank toÂ fill?_x005F_x000D_
A.	10
B.	8
C.	12
D.	15
Answer» D. 15

Discussion

240.	Pipe C and D alone can fill a tank in 4 and 5 hours, respectively. If pipe C is closed after 3 hours and atÂ the same time pipe D is opened. in how many hours will the tank get filled?_x005F_x000D_
A.	0.8
B.	1.25
C.	1
D.	1.5
Answer» C. 1

Discussion

241.	Pipe K fills a tank in 30 minutes. Pipe L can fill the same tank 5 times as fast as pipe K. If both the pipes were kept open when the tank is empty, how much time will it take for the tank to overflow ?
A.	3 minutes
B.	2 minutes
C.	4 minutes
D.	5 minutes
Answer» E.

Discussion

242.	Pipes A and B can fill a cistern in 15 hours together. But ifthese pipes operate separately A takes 40 hours less than Bto fill the tank. In how many hours the pipe A will fill thecistern working alone?
A.	60
B.	20
C.	40
D.	15
Answer» C. 40

Discussion

243.	Pipe A can fill an empty cistern in 4 hours while along with Pipe B it can fill it up in 3 hours. Only Pipe A is turned on for an hour after which Pipe B is also turned on. How much total time will it take to fill up the cistern?
A.	3 hrs 20 min
B.	3 hrs 25 min
C.	3 hrs 15 min
D.	3 hrs
Answer» D. 3 hrs

Discussion

244.	Pipe A is an inlet pipe that can fill an empty cistern in 69 hours. Pipe B can drain the filled cistern in 46hours. When the cistern was filled the two pipes are opened one at a time for an hour each, starting withPipe B. how long will it take for the cistern to be empty?
A.	11 days 10 hours
B.	11 days 7 hours
C.	11 days 12 hours
D.	1 days 13 hours
Answer» C. 11 days 12 hours

Discussion

245.	Pipe A could fill an empty cistern in 18 hrs while pipe B can drain a filled cistern in 30 hrs. When the cistern is empty, pipe A is turned on for an hour and then turned off. The pipes were alternately left open for an hour each time till the cistern was full. How much time did it take for the cistern to be full?
A.	90 hrs
B.	86 hrs 40 min
C.	45 hrs
D.	86 hrs 48 min
Answer» E.

Discussion

246.	Pipe A can fill an empty cistern in 6 hours while along with Pipe B it can fill it up in 4 hours. Only Pipe B is on for an hour after which Pipe A is also turned on. How much time will it take in all to fill up the cistern?
A.	4 hrs 25 min
B.	4 hrs 15 min
C.	4 hrs 40 min
D.	4 hrs
Answer» E.

Discussion

247.	Pipe A can fill an empty cistern in 5 hours while Pipe B lakes 6.25 hours to fill it. The two pipes areÂ opened simultaneously when the cistern is empty, but Pipe B is turned off after some time as a result ofÂ which the cistern is filled in 3.4 hours. For how many hours was Pipe B open?_x005F_x000D_
A.	1.5
B.	1
C.	2
D.	2.5
Answer» D. 2.5

Discussion

248.	Pipe A can fill a tank in 16 minutes and pipe B cam empty it in 24 minutes. If both the pipes are opened together after how many minutes should pipe B be closed, so that the tank is filled in 30 minutes Â ?
A.	21 min
B.	24 min
C.	20 min
D.	22 min
Answer» B. 24 min

Discussion

249.	P, Q and R are channels which discharge solutions A,B and C respectively in a tank. When the tank is empty and all the three channels are opened what is the proportion of the solution C in the tank after 3 minutes, if the channels P, Q and R can fill the tank from empty to full in 30 minutes and 20 minutes and 10 minutes respectively when they are opened one at a time.
A.	44506
B.	44505
C.	5
D.	6
Answer» B. 44505

Discussion

250.	One pipe can fill an empty cistern in 4 hours while another can drain the cistern when full in 10 hours. Both the pipes were turned on when the cistern was half-empty. How long will it take for the cistern to be full?
A.	3 hours 20 minutes
B.	6 hours 40 minutes
C.	4 hours 20 minutes
D.	5 hours 30 minutes
Answer» B. 6 hours 40 minutes

Discussion

Explore topic-wise MCQs in Arithmetic Ability.

Water flows into a tank which is 200 m long and 150 m wide, through a pipe of cross-section (0.3m x 0.2m) at 20 km/h. In what time will the water level be 12m Â ?

Working together, pipes A and B can fill an empty tank in 10 hours. They worked together for 4 hours and then B stopped and A continued filling the tank till it was full. It took a total of 13 hours to fill the tank. How long would it take A to fill the empty tank alone?

Two taps X and Y can fill a tank in 15 hours and 20 hours respectively. If the two taps are opened at 2 p.m., then at what time (in p.m.) should the tap X be closed to completely fill the tank at exactly 2 a.m.?

Two valves P and B can fill a sump in 37.5 minutes and 45 minutes respectively. Both valves are opened. The sump will be filled in just 30 minutes, if valve B is turned off after

Two taps P and Q can fill a tank in 24 hours and 18 hours respectively. If the two taps are opened at 11 a.m., then at what time (in p.m.) should the tap P be closed to completely fill the tank at exactly 2 a.m.?

Two pipes X and Y can individually fill a tank in 48 and 72 min respectively. If they are opened simultaneously, how long will it take for the tank to fill?Â _x005F_x000D_

Two pipes, when working one at a time, can fill a cistern in 3 hhrs and 4 hrs, resp while a third pipe can drain the cistern empty in 8 hrs. All the three pipes were opened together when the cistern was 1/12 full. How long did it take for the cistern to be completely full?

Two pipes, when working one at a time can fill a cistern in 2 hrs and 3 hrs, respectively while a third pipe can drain the cistern empty in 6 hrs. All the three pipes were opened together when the cistern was 1/6 full. How long will it take for the cistern to be completely full?

Two pipes can fill a cistern in 28 and 21 hours respectively and an another pipe can empty 30 gallons of water per hour. All the three pipes working together can fill the empty cistern in 84 hours. What is the capacity (in gallons) of the cistern?_x005F_x000D_

Two pipes A and B can separately fill a cistern in 60 min and 75 min respectively. There is a third pipe in the bottom of the cistern to empty it. If all the three pipes are simultaneously opened, then the cistern is full in 50 min. In how much time, the third pipe alone can empty the cistern ?

Two pipes namely A,B can fill a sump in 25 minutes and half an hour respectively and a pipe C can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity off the tank is

Two pipes fill a tank when working individually in 25 and 40 hours, respectively while a third pipe can drain the filled tank in 16 hours. If all the three pipes are turned on at the same time when the tank is empty, how long will it take to fill the tank completely ?

Two pipes A and B can fill a tank in 16 hrs and 12 hrs respectively. The capacity of theÂ tank is 240 liters. Both the pipes are opened simultaneously and closed after 2 hrs. How much more water need to fill the tank?

Three taps A,B and C can fill a tank in 12,15 and 20 hours respectively. If A is open all the time and B ,C are open for one hour each alternatively, the tank will be full in:

Two pipes A and B can fill a tank in 15 min and 20 min respectively. Both the pipes are opened together but after 4 min, pipe A is turned off. What is the total time required to fill the tank ?

Two filling taps P and Q together can fill a tank with rate of 40 lit/min and 60 lit/min respectively in 8 min. If a waste tap can empty the filled tank in 32 min, then what is the rate of waste tap ?

The ratio of efficiencies of two filling pipes is 4 : 5. There is a third emptying pipe which efficiency is two third of the average efficiency of first two filling pipes can empty a filled tank in 36 minutes. In how much time both the filling pipes can fill the tank when it is empty?

Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The number of hours taken by C alone to fill the tank is:

Three pipe P, Q and R can fill a tank in 12 minutes, 18 minutesand 24 minutes respectively. The pipe R is closed 12 minutesbefore the tank is filled. In what time the tank is full?

Taps X and Y can fill a tank in 30 and 40 minutes respectively.Tap Z can empty the filled tank in 60 minutes.If all the three taps are kept open for one minute each,how much time will the taps take to fill the tank?

Sita's bucket has thrice the capacity as Ramu's bucket. It takes 60 turns for Sita's bucket to fill the empty drum. How many turns it will take for both the buckets of Sita's and Ramu's, having each turn together to fill the empty drum?

Raghu's tanker can fill a cistern in 4 hours. After half the cistern is filled, three more similar tankers are opened. What is the total time taken to fillthe cistern completely?

Pipes A and B, when working together, can fill an empty tank in 24 hours. They work together for 8Â hours and then B is stopped but A continued to work. It took a total of 28 hours to fill the tank. How longÂ would it take A to fill the empty tank alone?_x005F_x000D_

Pipes A and B, when working together, can fill an empty tank in 8 hours. If B is stopped after 2 hours, it will take a total of 11 hrs to fill the tank. How long would it take A to fill the empty tank alone?_x005F_x000D_

Pipes A and C can fill an empty cistern in 7 and 10.5 hours, respectively while Pipe B can drain the filledÂ cistern in 5.25 hours. If the three pipes are turned on together when the cistern is empty, how manyÂ hours will it take for the cistern to be23full?_x005F_x000D_

Pipes A and C can fill an empty cistern in 32 and 48 hrs, respectively while Pipe B can drain the filled cistern in 24hrs. If the three pipes are turned on together when the cistern is empty, how many hrs will it take for the cistern to be 2/3 full?

Pipe A is an inlet pipe that can fill an empty cistern in 8.7 hours. Pipe B can drain a filled cistern in 5.8Â hours. When the cistern was filled the two pipes are opened one at a time for an hour each, starting withÂ Pipe B. How long will it take for the cistern to be empty?_x005F_x000D_

Pipe A takes 4 hours to fill a tank. Pipe B takes 6 hours to empty the same tank when full. If both thepipes are opened at the same time when the tank is empty, how many hours will it take for the tank toÂ fill?_x005F_x000D_

Pipe C and D alone can fill a tank in 4 and 5 hours, respectively. If pipe C is closed after 3 hours and atÂ the same time pipe D is opened. in how many hours will the tank get filled?_x005F_x000D_

Pipe K fills a tank in 30 minutes. Pipe L can fill the same tank 5 times as fast as pipe K. If both the pipes were kept open when the tank is empty, how much time will it take for the tank to overflow ?

Pipes A and B can fill a cistern in 15 hours together. But ifthese pipes operate separately A takes 40 hours less than Bto fill the tank. In how many hours the pipe A will fill thecistern working alone?

Pipe A can fill an empty cistern in 4 hours while along with Pipe B it can fill it up in 3 hours. Only Pipe A is turned on for an hour after which Pipe B is also turned on. How much total time will it take to fill up the cistern?

Pipe A is an inlet pipe that can fill an empty cistern in 69 hours. Pipe B can drain the filled cistern in 46hours. When the cistern was filled the two pipes are opened one at a time for an hour each, starting withPipe B. how long will it take for the cistern to be empty?

Pipe A can fill an empty cistern in 6 hours while along with Pipe B it can fill it up in 4 hours. Only Pipe B is on for an hour after which Pipe A is also turned on. How much time will it take in all to fill up the cistern?

Pipe A can fill a tank in 16 minutes and pipe B cam empty it in 24 minutes. If both the pipes are opened together after how many minutes should pipe B be closed, so that the tank is filled in 30 minutes Â ?

One pipe can fill an empty cistern in 4 hours while another can drain the cistern when full in 10 hours. Both the pipes were turned on when the cistern was half-empty. How long will it take for the cistern to be full?