Tick (✓) the correct answer:


Tick (✓) the correct answer:

A can do a piece of work in 15 days. B is 50% more efficient than A. A can finish it in

(a) 10 days

(b) $7 \frac{1}{2}$ days

(c) 12 days

(d) $10 \frac{1}{2}$ days



(a) 10 days

Work done by $\mathrm{A}$ in 1 day $=\frac{1}{15}$

$\mathrm{B}$ is $50 \%$ more efficient than $\mathrm{A}$.

$\therefore$ Work done by B in 1 day $=\frac{150}{100} \times \frac{1}{15}=\frac{1}{10}$

Thus, B can complete the work in 10 days.

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