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

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Question 204106: If 6 men can do a piece of work in 14 days, how many men are needed to do work in 21 days?
Found 2 solutions by scott8148, RAY100:
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
it takes 84 man-days (6 * 14) to do the job

to do the job in 21 days would take 4 men (84 / 21)

Answer by RAY100(1637) About Me  (Show Source):
You can put this solution on YOUR website!
1 job= 6 men *14 days = 84 man-days = xmen * 21 days,,,,,x=84/21= 4 men