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in Commercial Mathematics by (36.4k points)
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A work-force of 420 men with a contractor can finish a certain piece of work in 9 months. How many extra men must he employ to complete the job in 7 months?

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Best answer

Let the number of men required is x

Men 420 x
Time(months) 9 7

420 x 9 = 7 x x

x = \(\frac{420\times 9}{7}\) = 540

Therefore the number of extra men required to complete the work = 540 – 420 = 120 Men

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