A and b can do a work in 21 days, A is 7/4 times as efficient as B. In how many days, A alone can complete the 200/3%of the work?

A and b can do a work in 21 days, A is 7/4 times as efficient as B. In

1.	A and b can do a work in 21 days, A is 7/4 times as efficient as B. In how many days, A alone can complete the 200/3%of the work?
A.	36
B.	33
C.	22
D.	27
Answer» D. 27

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A and b can do a work in 21 days, A is 7/4 times as efficient as B. In how many days, A alone can complete the 200/3%of the work?

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