Thursday, May 2, 2019

Pipes-and-Cistern-Solved-Examples, MCQ (Free PDF)

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Content Covered:-
1. Two pipes A and B can fill a cistern in 371∕2 minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if pipe B is turned off after:
A. 5 min
B. 9 min
C. 10 min
D. 15 min

2. A pump can fill a tank with water in 2 hours. Because of a leak, it took 22∕3 hours to fill the tank. The leak can drain all the water of the tank in:
A. 6 hours
B. 8 hours
C. 9 hours
D. 10 hours

3. A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the tank in the same time during which the tank is filled by the third pipe alone. The second pipe fills the tank 5 hours faster than the first pipe and 4 hours slower than the third pipe. The time required by the first pipe is:
A. 30 hours
B. 15 hours
C. 10 hours
D. 6 hours

4. Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill the cistern. How much time will be taken by A to fill the cistern separately?
A. 6 hours
B. 2 hours
C. 4 hours
D. 3 hours

5. Two pipes A and B can fill a tank in 12 and 24 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?
A. 9 min
B. 8 min
C. 6 min
D. 4 min