Mark (✓) against the correct answer:


Mark (✓) against the correct answer:

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



(a) 10 days

A's 1 day work $=\frac{1}{14}$

B is $40 \%$ more efficient than A.

$\therefore$ B's 1 day work $=\frac{140}{100} \times \frac{1}{14}=\frac{1}{10}$

B takes 10 days to complete the work.

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