A is twice as fast as B. If B alone can do a piece of work in 30 days, in what time can A and B together complete the work?

A is twice as fast as B. If B alone can do a piece of work in 30 da

1.	A is twice as fast as B. If B alone can do a piece of work in 30 days, in what time can A and B together complete the work?
A.	10
B.	12
C.	15
D.	8
Answer» B. 12

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A is twice as fast as B. If B alone can do a piece of work in 30 days, in what time can A and B together complete the work?

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