SOLUTION: If 20 men complete one third of a piece of work in 20 days, how many more men should be employed to finish the remaining work in 25 days?

Question 488178: If 20 men complete one third of a piece of work in 20 days, how many more men should be employed to finish the remaining work in 25 days?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
20 men, 20 days, 1/3 work=1/20x1/20x1/3=1/1200 the amount of the work one man does in one day.
To finish 2/3 the work in 25 days is 2/3x1/25=2/75 work needs to be done each day
n/1200=2/75
75n=2400
n=2400/75=32 men
Since you already have 20 men, you need to hire 12 more to finish the job on time..
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