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Babu and Asha can do together a work in ...

Babu and Asha can do together a work in 7 days. Asha is `1(3)/(4)` times as efficient as Babu. The same work can be done by Asha in how many days?

A

`frac(49)(4)

B

`frac(49)(3)

C

11 days

D

`frac(8)(3)

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