12. If 28 men complete - of a piece...
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12. If 28 men complete - 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 (1) 5 (2) 6 (3) 4 (4) 3

11th - 12th Class
Maths
Solution
115
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12. (3) By ( frac{M_{1} D_{1}}{W_{1}}=frac{M_{2} D_{2}}{W_{2}} ) ( begin{aligned} frac{28 times 7}{frac{7}{8}} &=frac{x times 7}{frac{1}{8}} Rightarrow quad & x=frac{28}{7}=4 end{aligned} )
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