A is twice as good a workman as B and together they finish a piece of work in 13 days. In how many days will B alone finish the work?

A is twice as good a workman as B and together they finish a piece of

1.	A is twice as good a workman as B and together they finish a piece of work in 13 days. In how many days will B alone finish the work?
A.	19.5
B.	39
C.	21
D.	42
Answer» C. 21

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A is twice as good a workman as B and together they finish a piece of work in 13 days. In how many days will B alone finish the work?

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