SOLUTION: twelve people working at the same rate can paint a house in 5 days. How many people working at the same rate are required to paint the house in three days?

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Question 1019664: twelve people working at the same rate can paint a house in 5 days. How many people working at the same rate are required to paint the house in three days?
Answer by FrankM(1040) About Me  (Show Source):
You can put this solution on YOUR website!
12 people paint a house in 5 days. Therefore, 60 people paint a house in a day, and a person's rate is

%281%2F60%29%28house%2Fday%29
In 3 days, one person can paint
%283%2F60%29%28house%2Fday%29 (i.e. 1/20 house)
Therefore we need 60/3 people or 20 to paint 1 house in 3 days.