Category: Pipes and Cisterns

Pipe A can fill a tank in 5 hours, pipe B in 10 hours and pipe C in 30 hours. If all the pipes are open, in how many hours will the tank be filled?

Hamad Pipes and Cisterns 04/07/2021

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A. 2
B. 2.5
C. 3
D. 3.5
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A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottom. If the cistern is full the leak will empty it in.

Hamad Pipes and Cisterns 29/06/2021

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A. 16 hrs
B. 20 hrs
C. 25 hrs
D. 40 hrs
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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 and C are open for one hour each alternately, the tank will be full in_________?

Hamad Pipes and Cisterns 18/05/2021

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A. 6 hours
B. 6 2/3 hours
C. 7 hours
D. 7 1/2 hours

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 09/05/2021

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A. 4.5 hrs
B. 5 hrs
C. 6.5 hrs
D. 7.2 hrs
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A leak in the bottom of a tank can empty the full tank in 6 hours. An inlet pipe fills water at the rate of 4 liters per minute. When the tank is full in inlet is opened and due to the leak the tank is empties in 8 hours. The capacity of the tank is?

Hamad Pipes and Cisterns 12/04/2021

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A. 5260 liters
B. 5760 liters
C. 5846 liters
D. 6970 liters
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Two pipes function simultaneously the reservoir will be filled in 12 hours. One pipe fills reservoir 10 hours faster than the other. How many hours does the faster pipe take to fill the reservoir?

Hamad Pipes and Cisterns 30/03/2021

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A. 25 hrs
B. 28 hrs
C. 20 hrs
D. 35 hrs
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pipes P and Q would fill a cistern 18 and 24 minutes respectively. Both pipes being opened, find when the first pipe must be turned off so that the cistern may be just filled in 12 minutes?

Hamad Pipes and Cisterns 19/03/2021

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A. after 12 mins
B. after 9 mins
C. after 8 1/2 mins
D. after 10 mins
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Three pipes of same capacity can fill a tank in 8 hours. If there are only two pipes of same capacity, the tank can be filled in___________?

Hamad Pipes and Cisterns 14/03/2021

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A. 17 hours
B. 12 hours
C. 16 hours
D. 24 hours
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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 4 minutes the cistern was full. In what time can the waste pipe empty the cistern when fill?

Hamad Pipes and Cisterns 10/03/2021

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A. 7 min
B. 8 min
C. 9 min
D. 10 min
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Two pipes A and B can fill a cistern in 20 and 30 minutes respectively, and a third pipe C can empty it in 40 minutes. How long will it take to fill the cistern if all the three are opened at the same time?

Hamad Pipes and Cisterns 10/02/2021

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A. 19 1/7 min
B. 15 1/7 min
C. 17 1/7 min
D. 7 1/7 min
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