Time and Work - Data Intensity 1 :: Discussion


32.Two pipes P and Q can fill a cistern in 12 min. and 15 min. respectively but a third pipe ‘R’ can empty the full tank in 6 min. P and Q are kept open for 5 min. in the beginning and then ‘R’ is also opene In what time is the cistern emptied ?
A.30 min
B.35 min
C.40 min
D.45 min
Answer:  Option  D
Explanation:

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Published by:Michael Daani

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