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Q.

If90men can do a certain job in 61 days, working 12 hours/ day, then the part of that work which can be completed by 70 men in 24 days, working 8 hours/day is

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a

$\frac{5}{8}$

b

$\frac{2}{3}$

c

$\frac{7}{9}$

d

$\frac{1}{3}$

answer is B.

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Detailed Solution

Part of work completed

$= \frac{70 \times 24 \times 8}{90 \times 16 \times 12} = \frac{7}{9}$

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