A and B can do a work together in 18 days. A is three times as efficient as B. In how many days can B alone complete the work?

A and B can do a work together in 18 days. A is three times as efficie

1.	A and B can do a work together in 18 days. A is three times as efficient as B. In how many days can B alone complete the work?
A.	54 days
B.	64 days
C.	72 days
D.	60 days
Answer» D. 60 days

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A and B can do a work together in 18 days. A is three times as efficient as B. In how many days can B alone complete the work?

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