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

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Question 601588: If 6 men can do a piece of work in 14 days, how many men are needed to do the work in 21 days?
Found 2 solutions by flame8855, Alan3354:
Answer by flame8855(424) About Me  (Show Source):
You can put this solution on YOUR website!
6 men in 14 days
the rate is 6/14=3/7 men/day
21 days so 3/7*21= 9 men needed

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If 6 men can do a piece of work in 14 days, how many men are needed to do the work in 21 days?
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The work is 6*14 man-days = 84 man-days
84/21 = 4 men