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

Q16. > The question given below consists of a question > and two statements numbered I and II given below it. You have to > decide whether the data provided in the statement(s) is / are > sufficient to answer the given question. Read the both statements and select: > > > (A) if the data in Statement I alone is sufficient to > answer the question, while the data in Statement II alone is not > sufficient to answer the question. > > > (B) if the data in Statement II alone is sufficient to > answer the question, while the data in Statement I alone is not > sufficient to answer the question. > > > (C) if the data either in Statement I or in Statement II > alone is sufficient to answer the question. > > > (D) if the data in both Statements I and II together > is not sufficient to answer the question. > > > (E) if the data in both Statements I and II together is > necessary to answer the question. **How long will it take to empty the tank if both the inlet pipe A and the outlet pipe B are opened simultaneously?** **I. A can fill the tank in 16 minutes.** **II. B can empty the full tank in 8 minutes.**

  1.  A
  2.  B
  3.  C
  4.  D
  5.  E

Solution : E
Q17. Decide which of the statement(s) is/are necessary to answer the given question. **If both the pipes are opened, how many hours will be taken to fill the tank?** **I. The capacity of the tank is 400 liters.** **II. The pipe A fills the tank in 4 hours.** **III. The pipe B fills the tank in 6 hours.**

  1.  Only I and II
  2.  Only II and III
  3.  All I, II and III
  4.  Any two of the three
  5.  Even with all the three statements, answer cannot be given.

Solution : Only II and III

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Q18. **Two pipes A and B can fill a cistern in 20 and 30 minutes respectively, and a third pipe C can empty it in 40 minutes. How long will it take to fill the cistern if all the three are opened at the same time?**

  1.  19 1/7 min
  2.  15 1/7 min
  3.  17 1/7 min
  4.  7 1/7 min

Solution : 17 1/7 min
Q19. **Two pipes P and Q can fill a cistern in 12 and 15 minutes respectively. Both are opened together, but at the end of 3 minutes the first is turned off. How much longer will the cistern take to fill?**

  1.  9 1/4 min
  2.  11 1/4 min
  3.  7 1/4 min
  4.  8 1/4min

Solution : 8 1/4min

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Q20. **A cistern has a leak which would empty the cistern in 20 minutes. A tap is turned on which admits 4 liters a minute into the cistern, and it is emptied in 24 minutes. How many liters does the cistern hold?**

  1.  480 liters
  2.  600 liters
  3.  720 liters
  4.  800 liters

Solution : 480 liters
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