Asked by Will
If it takes 4 people 20 days to build a house, how long does it take 6 people. I know the answer is 15 days, but for the life of me I can't figure out the formula for it.
Answers
Answered by
MathMate
20 days are required for 4 people to build a house. So it takes 4*20=80 man-days.
If we have 6 people, then it <i>should</i> take 80/6=13.3 days to finish the house.
If we have 6 people, then it <i>should</i> take 80/6=13.3 days to finish the house.
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