Time and Work - Data Intensity 2 :: Discussion


38.X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joined him till the completion of the work. How long did the work last ?
A.6 days
B.10 days
C.15 days
D.20 days
Answer:  Option  B
Explanation:

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Published by:Michael Daani

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