A and B together can do a piece of work in 10 days. A alone can do it in 30 days. The time in which B alone can do it is:

A and B together can do a piece of work in 10 days. A alone can do it

1.	A and B together can do a piece of work in 10 days. A alone can do it in 30 days. The time in which B alone can do it is:
A.	20 days
B.	15 days
C.	12 days
D.	10 days
Answer» C. 12 days

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A and B together can do a piece of work in 10 days. A alone can do it in 30 days. The time in which B alone can do it is:

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