Question

a certain number of men can finish a piece of work in 10 days. if however there were 10 men less it will take 10 days more for the work to be finished. how many men were there originally?

Answer 1

Let x no. of men were there originally , then;
x × 10 = (x-10) × 20
10x = 20x -200
10x = 200
x = 20

Therefore there were 20 men originally,
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Answer 2

20 men will be required for this work