# Pipes and Cisterns

Pipes and Cisterns: Cistern meaning, Pipes and Cisterns Questions, Solved Problems

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## Online Aptitude Questions with Answers on Pipes and Cisterns

Q31. **A cistern which could be filled in 9 hours takes one hour more to be filled owing to a leak in its bottom. If the cistern is full in what time will the leak empty it?**

1.  45 hrs
2.  60 hrs
3.  75 hrs
4.  90 hrs

Solution : 90 hrs
Q32. **A pipe can fill a cistern in 20 minutes whereas the cistern when fill can be emptied by a leak in 28 minutes. When both pipes are opened, find when the cistern will be full?**

1.  60 min
2.  80 min
3.  70 min
4.  48 min

Solution : 70 min
Q33. **Pipes A and B can fill a cistern in 8 and 24 minutes respectively. They are opened an alternate minutes. Find how many minutes, the cistern shall be full?**

1.  6 min
2.  12 min
3.  19 min
4.  10 min

Solution : 12 min
Q34. **A cistern has three pipes, A, B and C. The pipes A and B can fill it in 4 and 5 hours respectively and C can empty it in 2 hours. If the pipes are opened in order at 1, 2 and 3 A.M. When will the cistern be empty?**

1.  3 PM
2.  7 PM
3.  4 PM
4.  5 PM

Solution : 5 PM

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Q35. **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.**

1.  17 hours
2.  12 hours
3.  16 hours
4.  24 hours

Solution : 12 hours
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