Pipes and Cisterns
5 SSC CGL Quantitative Aptitude previous year questions on Pipes and Cisterns — options free on every question; 1 include the answer & explanation free, the rest unlock with PYQ Pass.
Q1 FREE PREVIEW
PYQThere are two water taps in a tank which can fill the empty tank in 12 hours and 18 hours respectively. It is seen that there is a leakage point at the bottom of the tank which can empty the completely filled tank in 36 hours. If both the water taps are opened at the same time to fill the empty tank and the leakage point was repaired after 1 hour, then in how much time the empty tank will be completely filled?
✓ Correct answer: c) 7 hours 24 minutes
ExplanationLet the capacity of the tank be 36a litres.Then, efficiency of tap 1 = 36a/12 = 3a litres/hour, Efficiency of tap 2 = 36a/18 = 2a litres/hour And efficiency of leakage point = -36a/36 = -a litres/hour Combined efficiency of all taps = 3a + 2a = 5a litres/hours Capacity filled in first hour = 5a – a = 4a litres Remaining capacity = 36a – 4a = 32a litres Time taken to fill the remaining capacity = 32a/5a = 6.4 hours Total time taken = 1 + 6.4 = 7.4 hours = 7 hours 24 minutes Hence, Option C is the correct answer.
Q2
PYQPipe A can fill a tank in 12 minutes; pipe B can fill it in 18 minutes, while pipe can empty the full tank in 36 minutes. If all the pipes are opened simultaneously, how much time will it take to fill the empty tank completely?
🔒
Answer & explanation — PYQ Pass
Unlock · ₹149
Options are free to see. Unlock the correct answer and full explanation with Pass.
Q3
PYQEach inlet pipe can fill an empty cistern in 84 hours while each drain pipe can empty the same cistern from a filled condition in 105 hours. When the cistern is empty, 9 inlet pipes and 10 outlet pipes are simultaneously opened. After how many hours will the cistern be completely filled?
🔒
Answer & explanation — PYQ Pass
Unlock · ₹149
Options are free to see. Unlock the correct answer and full explanation with Pass.
Q4
PYQA pipe can fill a tank in 30 hours. Due to a leakage at the bottom, it is filled in 50 hours. How much time will the leakage take to empty the completely filled tank?
🔒
Answer & explanation — PYQ Pass
Unlock · ₹149
Options are free to see. Unlock the correct answer and full explanation with Pass.
Q5
PYQPipe A can fill of the tank in 6 hours and pipe B can completely fill the same tank in 18 hours. If both the pipes are opened at the same time, in how much time (in minutes) will the empty tank be completely filled?
🔒
Answer & explanation — PYQ Pass
Unlock · ₹149
Options are free to see. Unlock the correct answer and full explanation with Pass.
Practice more SSC CGL Quantitative Aptitude PYQs
Browse every Quantitative Aptitude chapter, or explore the full SSC CGL question bank.
All Quantitative Aptitude chapters →