If X and Y can complete a piece of work in 15 days, and X alone can do the same work in 30 days, find how many days will Y alone take to complete the same work?

If X and Y can complete a piece of work in 15 days, and X alone can do

1.	If X and Y can complete a piece of work in 15 days, and X alone can do the same work in 30 days, find how many days will Y alone take to complete the same work?
A.	60 days
B.	45 days
C.	30 days
D.	15 days
Answer» D. 15 days

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If X and Y can complete a piece of work in 15 days, and X alone can do the same work in 30 days, find how many days will Y alone take to complete the same work?

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