Pipes and Cisterns Set 1

We are here with Set of questions related to pipes and cisterns which are important for aptitude section of SSC CGL exams.

Q1. Pipes A and B can fill a tank in 5 and 6 hours, respectively. Pipe C can empty it in 12 hours. The tank is half full. All the three pipes are in operation simultaneously. After how much time, the tank will be full?
(a) 3 (9/17) h
(b) 11 h
(c) 2 (8/11) h
(d) 1 (13/17) h
(e) 2 (3/17) h

Q2. A cistern has two taps (which fill it in 12 min and 15 min, respectively) and an exhaust tap. When all three taps are opened together, it takes 20 min to fill the empty cistern. How long will the exhaust tap take to empty it?
(a) 20 min
(b) 16 min
(c) 12 min
(d) 10 min
(e) 7 min

Q3. A cistern is filled up in 5 hours and it takes 6 hours when there is a leak in its bottom. If the cistern is full, in what time shall the leak empty it?
(a) 6 h
(b) 5 h
(c) 30 h
(d) 15 h
(e) 25 h

Q4. Pipe A and B running together can fill a cistern in 6 minutes. If B takes 5 minutes more than A to fill the cistern then the times in which A and B will fill the cistern separately will be, respectively:
(a) 15 min, 20 min
(b) 15 min, 10 min
(c) 10 min, 15 min
(d) 25 min, 20 min
(e) None of these

Q5. Two pipes can fill a tank in 10 hours and 12 hours respectively, while the third can empty it in 20 hours. If all the pipes are opened together, the tank will be filled in:
(a) 7 ½ hours
(b) 10 hours
(c) 8 hours
(d) 9 (1/10) hours
(e) 6 hours

ANSWERS:

1 – D 2 – D 3 – C 4 – C 5 – A

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