A and B can do a job together in 7 days. A is 1 times as efficient as B. The same job can be done by A alone in :

A and B can do a job together in 7 days. A is 1 times as efficient as

1.	A and B can do a job together in 7 days. A is 1 times as efficient as B. The same job can be done by A alone in :
A.
B.	11 days
C.
D.
Answer» C.

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A and B can do a job together in 7 days. A is 1 times as efficient as B. The same job can be done by A alone in :

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