SOLUTION: 3 people can paint 4 walls in 36 minutes. How many minutes will it take for 7 people to paint 7 walls? Round to the nearest minute?

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Question 802845: 3 people can paint 4 walls in 36 minutes.
How many minutes will it take for 7 people to paint 7 walls? Round to the nearest minute?

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
7 people paint 7 walls in the same time it takes for
1 person to paint 1 wall and also for
3 people to paint 3 walls
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given:
3 people paint 4 walls in 36 min
3 people can paint 1 wall in 1/4 that time, or
+%281%2F4%29%2A36+=+9+ min
3 people can paint 3 walls in 3 times that time, or
+3%2A9+=+27+ min
7 people paint 7 walls in 27 min also