# A can do a piece of work in 14 days and B is 40% more efficient than A. In how many days can B finish it? A. 10 days B. 7 (1/2) days

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A can do a piece of work in 14 days and B is 40% more efficient than A. In how many days can B finish it?

A. 10 days

B. $7\frac{1}{2}$ days

C. $5\frac{1}{4}$ days

D. $5\frac{3}{5}$ days

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Number of days required by A to finish the work : 14 days

Work done by A in one day: $\frac{1}{14}$

B can work 40% more efficiently than A,

∴ B's one day work = 140% of $\frac{1}{15}=(\frac{140}{100}\times\frac{1}{14})=\frac{1}{10}$

∴ B alone can complete the work in 10 days.