SOLUTION: 6 people can paint 4 walls in 43 minutes. How many minutes will it take for 7 people to paint 7 walls? Round to the nearest minute. i know the answer is 65 minutes, i just do

Question 607974: 6 people can paint 4 walls in 43 minutes.
How many minutes will it take for 7 people to paint 7 walls? Round to the nearest minute.
i know the answer is 65 minutes, i just dont know how to get there.

Answer by abookum(1) (Show Source): You can put this solution on YOUR website!
No the answer is 64.5 minutes.
Explanation in words:
First understand that the problem presented means that it takes 6*43=258 minutes
of man-work to paint 4 walls
Which means that it takes 258/4=64.5 minutes of man-work to paint each wall.
Therefore, it takes 64.5*7=451.5 of man-work to paint 7 walls.
Finally we derive the answer to the problem as so: it takes 451.5/7=64.5 minutes for 7 people to paint 7 walls.
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