Category: Pipes and Cisterns

Two pipes A and B can separately fill a tank in 12 and 15 minutes respectively. A third pipe C can drain off 45 liters of water per minute. If all the pipes are opened, the tank can be filled in 15 minutes. What is the capacity of the tank?

Hamad Pipes and Cisterns 17/12/2021

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A. 480 liters
B. 540 liters
C. 600 liters
D. 675 liters
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A large tanker can be filled by two pipes A and B in 60 minutes and 40 minutes respectively. How many minutes will it take to fill the tanker from empty state if B is used for half the time and A and B fill it together for the other half?

Hamad Pipes and Cisterns 11/12/2021

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A. 15 min
B. 20 min
C. 27.5 min
D. 30 min

A water tank is two-fifth full. Pipe A can fill a tank in 10 minutes and pipe B can empty it in 6 minutes. If both the pipes are open, how long will it take to empty or fill the tank completely?

Hamad Pipes and Cisterns 30/11/2021

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A. 6 min. to empty
B. 6 min. to full
C. 9 min. to empty
D. 9 min. to full
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A cistern can be filled by a tap in 4 hours while it can be emptied by another tap in 9 hours. If both the taps are opened simultaneously, then after how much time will the cistern get filled?

Hamad Pipes and Cisterns 21/11/2021

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A. 4.5 hrs
B. 5 hrs
C. 6.5 hrs
D. 7.2 hrs

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?

Hamad Pipes and Cisterns 09/11/2021

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A. 2 hrs 15 min
B. 4 hrs 24 min
C. 5 hrs
D. 3 hrs
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A pipe can fill a cistern in 20 minutes whereas the cistern when fill can be emptied by a leak in 28 minutes. When both pipes are opened, find when the cistern will be full?

Hamad Pipes and Cisterns 30/09/2021

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A. 60 min
B. 80 min
C. 70 min
D. 48 min
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A top can fill a cistern in 8 hours and another can empty it in 16 hours. If both the taps are opened simultaneously the time (in hours) to fill the tank is

Hamad Pipes and Cisterns 07/09/2021

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A. 8
B. 10
C. 16
D. 24
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A tap can fill a tank in 6 hours. After half the tank is filled three more similar taps are opened. What is the total time taken to fill the tank completely?

Hamad Pipes and Cisterns 07/09/2021

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A. 3 hrs 15 min
B. 3 hrs 45 min
C. 4 hrs
D. 4 hrs 15 min
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Two pipes A and B can fill a tank in 20 and 30 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?

Hamad Pipes and Cisterns 05/09/2021

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A. 12 min
B. 15 min
C. 25 min
D. 50 min
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A pump can fill a tank with water in 2 hours. Because of a leak, it took 2 1/3 hours to fill the tank. The leak can drain all the water of the tank in?

Hamad Pipes and Cisterns 19/08/2021

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A. 4 1/3 hrs
B. 7 hrs
C. 8 hrs
D. 14 hrs
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