If 6 men can do a piece of work in 14 days, how many men are needed to do the work in 21days?

1 answer:

4 0

Total work amount
6 men * 14 days
84 men days

If it is done within 21 days, need x men
84 men days = x men * 21 days
x = 84/21 men
x = 4 men

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