Question 15

A certain number of men can do a piece of work in 60 days. If there were 6 men more, the work can be finished 20 days earlier. The number of men working is

Solution

Let the number of men initially working be $$x$$ who could finished the work in 60 days

Now, $$(x+6)$$ men can finish the work in 60 - 20 = 40 days

=> $$x \times 60=(x+6) \times 40$$

=> $$3x=2x+12$$

=> $$3x-2x=x=12$$

$$\therefore$$ The number of men working = 12

=> Ans - (B)

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