pipes-and-cisterns

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

Q41. **A cistern can be filled by a tap in 4 hours while it can be emptied by another tap in 9 hours. If both the taps are opened simultaneously, then after how much time will the cistern get filled?**

  1.  4.5 hrs
  2.  5 hrs
  3.  6.5 hrs
  4.  7.2 hrs

Solution : 7.2 hrs
Q42. **A tap can fill a tank in 6 hours. After half the tank is filled three more similar taps are opened. What is the total time taken to fill the tank completely?**

  1.  3 hrs 15 min
  2.  3 hrs 45 min
  3.  4 hrs
  4.  4 hrs 15 min

Solution : 3 hrs 45 min

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Q43. **A water tank is two-fifth full. Pipe A can fill a tank in 10 minutes and pipe B can empty it in 6 minutes. If both the pipes are open, how long will it take to empty or fill the tank completely?**

  1.  6 min. to empty
  2.  6 min. to full
  3.  9 min. to empty
  4.  9 min. to full

Solution : 6 min. to empty
Q44. **Pipe A can fill a tank in 5 hours, pipe B in 10 hours and pipe C in 30 hours. If all the pipes are open, in how many hours will the tank be filled?**

  1.  2
  2.  2.5
  3.  3
  4.  3.5

Solution : 3

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Q45. **Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the tank will be filled in?**

  1.  1 13/17 hours
  2.  2 8/11 hours
  3.  3 9/17 hours
  4.  4 1/2 hours

Solution : 3 9/17 hours
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