Pipes and Cisterns - Data Intensity 1 :: Discussion


30.Pipe A can fill a tank in 16 minutes and pipe B cam empty it in 24 minutes. If both the pipes are opened together after how many minutes should pipe B be closed, so that the tank is filled in 30 minutes?
A.20
B.24
C.23
D.None of these
Answer:  Option  D
Explanation:

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Published by:Michael Daani

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