It takes 63 minutes for 4 people to paint 9 walls. How many minutes does it take 7 people to paint 4 walls?

Guest Apr 18, 2020

#1**+1 **

Hello Guest!

We can use unit rates for the problem.

63 minutes: 4 people: 9 walls

63*4 mins: 1 person: 9 walls

63*4/9 mins: 1 person: 1 wall

28 mins: 1 person: 1 wall.

This is the unit rate.

Then it takes 7 people 4 minutes to paint 1 wall.

For 4 walls, 4*4= **16 minutes for 7 people to paint 4 walls. **

I hope this helps Guest.

Guest Apr 18, 2020

#2**+1 **

If 4 people work 63 minutes each, they have worked a total of 4 x 63 = 252 minutes.

They got 9 walls painted, so each wall took 252 / 9 = 28 minutes.

If you have 4 walls, it will take 4 x 28 = 112 minutes.

You have 7 people, so each person will paint for 112 / 7 = 16 minutes.

geno3141 Apr 18, 2020