Two pipes A and B can fill a tank in 4 and 5 hours respectively. If they are turned up alternately for one hour each, the time taken to fill the tank is?

Two pipes A and B can fill a tank in 4 and 5 hours respectively. If t

1.	Two pipes A and B can fill a tank in 4 and 5 hours respectively. If they are turned up alternately for one hour each, the time taken to fill the tank is?
A.	2 hrs 15 min
B.	4 hrs 24 min
C.	5 hrs
D.	3 hrs
Answer» C. 5 hrs

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Two pipes A and B can fill a tank in 4 and 5 hours respectively. If they are turned up alternately for one hour each, the time taken to fill the tank is?

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