SOLUTION: IT TAKES 20 MEN 60DAYS TO COMPLETE A BUILDING WORK, HOW MANY DAYS LONGER WOULD IT TAKES 15 MEN ASSURING THAT THEY ALL WORK AT THE SAME RATE

Question 1191584: IT TAKES 20 MEN 60DAYS TO COMPLETE A BUILDING WORK, HOW MANY DAYS LONGER WOULD IT TAKES 15 MEN ASSURING THAT THEY ALL WORK AT THE SAME RATE
Found 4 solutions by josgarithmetic, Alan3354, greenestamps, MathTherapy:
Answer by josgarithmetic(39630)   (Show Source): You can put this solution on YOUR website!
20 men need 60 days for the job
15 men, then the speed becomes 0.75 of what it was so .

To use some algebra,
r, the work rate of 1 man
1, for 1 piece of work or job
x, how many days

Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
IT TAKES 20 MEN 60DAYS TO COMPLETE A BUILDING WORK, HOW MANY DAYS LONGER WOULD IT TAKES 15 MEN ASSURING THAT THEY ALL WORK AT THE SAME RATE
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Jobs are often expressed in man-hours of man-days estimated to do them.
20*60 = 1200 man-days
1200/15 = 80 days
Answer by greenestamps(13209)   (Show Source): You can put this solution on YOUR website!

15/20 = 3/4 as many men means 4/3 as many days.

ANSWER: 60(4/3) = 80 days

Answer by MathTherapy(10557)   (Show Source): You can put this solution on YOUR website!

IT TAKES 20 MEN 60DAYS TO COMPLETE A BUILDING WORK, HOW MANY DAYS LONGER WOULD IT TAKES 15 MEN ASSURING THAT THEY ALL WORK AT THE SAME RATE

Time it takes 15 men, working at the same rate, or
Days longer that it'd take 15 men: 80 - 60 = 20
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