# 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

Q6. **A tank is filled in 5 hours by three pipes A, B and C. The pipe C is twice as fast as B and B is twice as fast as A. How much time will pipe A alone take to fill the tank?**

1.  20 hours
2.  25 hours
3.  35 hour
4.  Cannot be determined
5.  None of these

Solution : 35 hour
Q7. **Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill the cistern. How much time will be taken by A to fill the cistern separately?**

1.  1 hour
2.  2 hours
3.  6 hours
4.  8 hours

Solution : 6 hours
Q8. **Two pipes A and B can fill a tank in 20 and 30 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?**

1.  12 min
2.  15 min
3.  25 min
4.  50 min

Solution : 12 min
Q9. **Two pipes A and B can fill a tank in 15 minutes and 20 minutes respectively. Both the pipes are opened together but after 4 minutes, pipe A is turned off. What is the total time required to fill the tank?**

1.  10 min. 20 sec.
2.  11 min. 45 sec.
3.  12 min. 30 sec.
4.  14 min. 40 sec

Solution : 14 min. 40 sec

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Q10. **One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, then the slower pipe alone will be able to fill the tank in:**

1.  81 min.
2.  108 min.
3.  144 min.
4.  192 min.

Solution : 144 min.
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