A waste pipe W can empty tank S in 15 minutes Find the time in which the tank S will be full if all ...........

Quantitative Aptitude ( CCS) Pipes&cistern

Study the following graph carefully to answer the given questions
Time taken by pipes to fill tanks in minutes

A waste pipe W can empty tank S in 15 minutes. Find the time in which the tank S will be full if all the pipes are opened together.

10 minutes

12 minutes

15 minutes

16 minutes

18 minutes

Total time taken = 1/(1/10 + 1/30 – 1/15) = 1/(2/30) = 15 min

hence option 3 is correct.

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