# Pipes and Cisterns Questions and answers

Topics

1). Two pipes A and B can fill a tank in 18 and 6 h, respectively. If both the pipes are opened simultaneously, how much time will be taken to fill the tank?
 A). $$\Large 4\frac{1}2{}$$ h B). 7 h C). 6 h D). 10 h
2). There are two tanks A and B to fill up a water tank. The tank can be filled in 40 min, if both taps are on. The same tank can be filled in 60 min, if tap A alone is on. How much time will tap alone take, to fill up the same tank?
 A). 64 min B). 80 min C). 96 min D). 120 min
3). A cistern can be filled up in 4 h by an inlet A. An outlet B can empty the cistern in 8 h. If both A and B are opened simultaneously, then after how much time the cistern get filled?
 A). 5 h B). 7 h C). 8 h D). 6 h
4). A pipe can fill a tank in 20 h. Due to a leak in the bottom, it is filled in 40 h. If the tank is full, how much time will the leak take to empty it?
 A). 40 h B). 30 h C). 50 h D). 30 h
5). A pipe can fill a tank in 10 h, while an another pipe can empty it in 6 h. Find the time taken to empty the tank, when both the pipes are opened up simultaneously.
 A). 11 h B). 15 h C). 18 h D). 16 h

6). Three taps are fitted in a cistern. The empty cistern is filled by the first and the second taps in 3 and 4 h, respectively. The full cistern is emptied by the third tap in 5 h. If all three taps are opened simultaneously, the empty cistern will be filled up in
 A). $$\Large 1\frac{14}{23}$$ B). $$\Large 2\frac{14}{23}$$ C). 2 h 40 min D). 1 h 56 min
7). Pipe A can fill a tank in 30 min, while pipe B can fill the same tank in 10 min and pipe C can empty the full tank in 40 min. If all the pipes are opened together, how much time will be needed to make the tank full?
 A). $$\Large 9\frac{3}{13}$$ h B). $$\Large 9\frac{4}{13}$$ h C). $$\Large 9\frac{7}{13}$$ h D). $$\Large 9\frac{9}{13}$$ h
8). Pipes A and B can fill a tank in 5 and 6 h, respectively. Pipe C can fill it in 30 h. If all the three pipes are opened together, then in how much time the tank will be filled up?
 A). $$\Large 3\frac{3}{14}$$ h B). $$\Large 2\frac{1}{2}$$ h C). $$\Large 3\frac{9}{14}$$ h D). $$\Large 2\frac{1}{14}$$ h
9). Through an inlet, a tank takes 8 h to get filled up. Due to a leak in the bottom, it takes 2 h more to get it filled completely. If the tank is full, how much time will the leak take to empty it?
 A). 16 h B). 20 h C). 32 h D). 40 h
10). A tap can fill an empty tank in 12 h and a leakage can empty the tank in 20 h. If tap and leakage both work together, then how long will it take to fill the tank?
 A). 25 h B). 40 h C). 30 h D). 35 h
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