A is twice as good a workman as B and together they finish a piece of work in 14 days. The number of days taken by A alone to finish the work is

 A is twice as good a workman as B and together they finish a piece of work in 14 days. The number of days taken by A alone to finish the work is

A).  11 days

B). 21 days

C).  28 days

D). 42 days

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