SOLUTION: This problem was on a pre-employment exam.
If 6 men can do a piece of work in 14 days, how many men are needed to do the work in 21 days?
Algebra.Com
Question 99755: This problem was on a pre-employment exam.
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 Earlsdon, ankor@dixie-net.com:
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Try this!
6 men in 14 days = x men in 21 days. Written as a proportion:
Multiply both sides by 21.
Simplify.
It'll take 9 men to do the same job in 21 days.
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My answer here is incorrect!
Please see the correct answer (#72623) of 4 men given by ankor.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
This problem was on a pre-employment exam.
If 6 men can do a piece of work in 14 days, how many men are needed to do the work in 21 days?
:
It helps to convert the completed job to man-days
:
In this job, 6 * 14 = 84 man-days required to complete the job
:
If you want the job done 21 days: = 4 men will complete it in 21 days
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