A certain number of men can finish a piece of work in 100 days. If there were 10 men less, it would take 10 days more for the work to be finished. How many men were there originally?

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Originally let there be x men. Less men, More days (Indirect Proportion) Therefore, (x-10) : x :: 100 :110 => (x - 10) * 110 = x * 100 => x= 110

A certain number of men can finish a piece of work in 100 days. If there were 10 men less, it would take 10 days more for the work to be finished. How many men were there originally?

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