Question 473661: 18 workers do a job in 40 days, if 6 workers were added from the beginning of the job , how many days it will need to finish that job?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 18 workers do a job in 40 days, if 6 workers were added from the beginning of the job , how many days will be needed to finish that job?
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18*40 = 720 man-days are needed to do the job.
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With 18+6 = 24 workers the time required would be 720/24 = 30
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Another way to work it would be:
# of men and # of days are inversely related.
d = k/m
Solve for "k" using "18 men do the job in 40 days"
40 = k/18
k = 720
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Equation:
d = 720/m
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Then solve "if 6 workers were added from the beginning of the job , how many days will be needed to finish that job"?
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d = 720/24
d = 30 days
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cheers,
Stan H.
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Cheers,
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