Pipe and Cistern Questions for SSC and Bank Exams

Pipe and Cistern questions for Competitive exams

17. Two pipes can fill a tank in 10 hours and 12 hours respectively while a third pipe empties the full tank in 20 hours. If all the three pipes operate simultaneously, how much time will the tank be filled?

(A) 7 hrs 30 min.

(B) 7 hrs 45 min.

(C) 7 hrs 15 min.

(D) 8 hrs 5 min.

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18. An electric pump can fill a tank in 3 hours. Because of a leak in the tank, it took   hours to fill the tank. If the tank is full, how much time will the leak take to empty it?

(A) 21 hrs 15 min

(B) 22 hrs

(C) 22 hrs 5 min

(D) 21 hrs

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19. Two pipes A and B can fill a tank in 36 min and 45 min. respectively. A water pipe C can empty the tank in 30 min. First A and B are opened. After 7 minutes, C is also opened. In how much time, the tank is full?

(A) 39 min

(B) 46 min

(C) 48 min

(D) 41 min

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20. Two pipes A and B can fill a tank in 24 min and 32 min respectively. If both the pipes are opened simultaneously, after how much time B should be closed so that the tank is full in 18 minutes?

(A) 8 min 2 sec.

(B) 7 min.

(C) 8 min.

(D) 7 min 5 sec.

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