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.**
- A
- B
- C
- D
- 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.**
- Only I and II
- Only II and III
- All I, II and III
- Any two of the three
- Even with all the three statements, answer cannot be given.
Solution : Only II and III
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?**
- 19 1/7 min
- 15 1/7 min
- 17 1/7 min
- 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?**
- 9 1/4 min
- 11 1/4 min
- 7 1/4 min
- 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?**
- 480 liters
- 600 liters
- 720 liters
- 800 liters
Solution : 480 liters
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