Discussion
A certain number of men can complete a piece of work in 180 days. If there are 30 men less, it will take 20 days more for the work to be completed. How many men were there originally?
Answer: E
Let there be x men originally.
They were to complete the work in 180 days but as the number of persons is reduced to x - 30.
∴ Work takes 20 more days. So the equation is 180x = (x - 30)200 ⇒ 20x = 6000 ⇒ x = 300.
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