B is 20% efficient than A. B started the...

B is 20% efficient than A. B started the work & do it for x days. And then B is replaced by A. And A completed the remaining work in x+8 days. Ratio of work done by A & B is 3:2. In how many day A & B working together to complete the whole work?

A

`13 11/17`days

B

`12 7/11` days

C

`13 7/11` days

D

`12 8/13` days

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The correct Answer is:

C

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