It takes 63 minutes for 4 people to paint 9 walls.How many minutes does it take 7 people to paint 4 walls?
Accepted Solution
A:
63 / 9 = 7 7 / 4 = 1.75 It takes 1.75 minutes for 1 person to paint 1 wall... 1.75 * 4 = 7 7 * 7 = 49 It took 49 minutes for 7 people to paint 4 walls...