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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.

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