A can do the piece of work in 20 days which B can do in 12 days. B worked at it for 9 days. A can finish the remaining work in

 A can do the piece of work in 20 days which B can do in 12 days. B worked at it for 9 days. A can finish the remaining work in

A).  5 days

B). 7 days

C).  11 days

D). 3 days

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