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

Q56. **Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank is?**

  1.  60 gallons
  2.  100 gallons
  3.  120 gallons
  4.  180 gallons

Solution : 120 gallons
Q57. **Two pipes A and B can fill a cistern in 37 1/2 minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if the pipe B is turned off after?**

  1.  5 min
  2.  9 min
  3.  10 min
  4.  15 min

Solution : 9 min
Q58. **Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours. C is closed A and B can fill the remaining par in 7 hours. The number of hours taken by C alone to fill the tank is?**

  1.  10
  2.  12
  3.  14
  4.  16

Solution : 14


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