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If 28 men complete frac 7 8 of a piece of...

This question belongs to Arithmetic Ability Time And Work
Time and Work
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If 28 men complete $$\frac{7}{8}$$ of a piece of work in a week, then the number of men, who must be engaged to get the remaining work completed in another week, is = ?

Answer & Solution
Correct Answer: Option C
$$\eqalign{ & \frac{{{\text{28 M}} \times {\text{1 Week}}}}{{\frac{7}{8}}} = \frac{{x \times {\text{ 1 Week}}}}{{\frac{1}{8}}} \cr & \Leftrightarrow x = 4{\text{ men}} \cr} $$
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