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A takes 10 days less than the time taken...

A takes 10 days less than the time taken by B to finish a piece of work. If both A and 6 can do it in 12 days, then the time taken by B alone to finish the work is

A

(a)30 days

B

(b)27 days

C

(c)20 days

D

(d)25 days

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