A tap can empty a tank in one hour A second tap can empty it in 30 minutes. If both the taps operate simultaneously, how much time is needed to empty the tank?

A tap can empty a tank in one hour A second tap can empty it in 30 min

1.	A tap can empty a tank in one hour A second tap can empty it in 30 minutes. If both the taps operate simultaneously, how much time is needed to empty the tank?
A.	20 min
B.	30 min
C.	40 min
D.	45 min
Answer» B. 30 min

Discussion

No Comment Found

Related MCQs

Anil alone can do a piece of work in 6 days and Binu alone in 8 days. Anil and Binu undertook to do it for Rs. 240. With the help of Chitra, they completed the work in 3 days. How much more money is to be paid to Anil than Chitra?A. 120B. 30C. 100D. 90
An officer undertakes to complete a job in 300 days. He employs 300 people for 60 days and they complete half of the work. He then reduces the number of people to 100, who work for 120 days, after which there are 20 days holiday. How many people must be employed for the remaining period to finish the work?
In a work, a man is twice as fast as a woman and a woman is twice as fast as a boy. If all of them, i.e. a man, a woman and a boy together can complete a work in 4 days, then in how many days will a boy alone complete it?
A completes \(\dfrac{1}{8}\) part of a given work in 8 days while B completes \(\dfrac{2}{5}\) part of the same work in 16 days. If A and B work together, then what will be the number of days taken by them to finish the work?
A and B can do a piece of work in 25 days. B alone can do \(66 \frac{2}{3}\)% of the same work in 30 days. In how many days can A alone do (4/15) part of same work?
Kamal and Anil can dig a pond in 8 days and 14 days, respectively. If the total wages of digging is ₹ 4,400 then how much money will Anil earn?
A and B can do a job in 5 days, B and C can do the same job in 6 days and C and A can do the same job in 7.5 days. A, B, and C together will complete the same job in how many days?
Pipes A & B can together fill a tank in 4 hours, while pipes C & D can individually empty the tank in 10 hours and 12 hours respectively. When the tank was empty, pipes A & B were simultaneously opened. After an hour, pipe C was also opened. After the opening of pipe C, pipe D will be opened after how much time such that the tank is only half filled in 3 hours?
A tanker can fill a cistern in 12 hours. After half the cistern is filled, 2 more similar tankers are opened. What is the time taken to fill the remaining half of the tank?
A certain number of persons can complete a work in 34 days working 9 h a day. If the number of persons is decreased by 40% then how many hours a day should the remaining persons work to complete the work in 51 days?

A tap can empty a tank in one hour A second tap can empty it in 30 minutes. If both the taps operate simultaneously, how much time is needed to empty the tank?

Discussion

No Comment Found

Related MCQs

Reply to Comment