A and B can do a piece of work alone in 15 and 30 days respectively. In how many days can they together complete the work?

A and B can do a piece of work alone in 15 and 30 days respectively. I

1.	A and B can do a piece of work alone in 15 and 30 days respectively. In how many days can they together complete the work?
A.	10
B.	8
C.	12
D.	9
Answer» B. 8

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A and B can do a piece of work alone in 15 and 30 days respectively. In how many days can they together complete the work?

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