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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Q 1423312241.     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

` 9 1/3` days

B

`11` days

C

` 11 1/4` days

D

` 12 1/3` days

E

None of these

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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