All of the members of our spray-painting team paint at the same speed. If 20 team members can paint a 4800 square foot wall in 36 minutes, then how many minutes would it take for 9 team members to paint a 3600 square foot wall?

Guest Feb 9, 2020

#1**+1 **

so write like this:

20 people -> 4800 @36min

9 people -> 3600

now we have to find efficiency of each person

20*36min*efficiency = 4800

efficiency = 6.66667

therefore, 9 people * 6.6667 * time = 3600

time = 60 minutes

Easy peazy

Klson Feb 9, 2020

#4**0 **

20 team members paint a 4800 square wall in 36 minutes.

How fast can one team member paint?

20 * 36 = 720 minutes

One team member can paint a 4800 square wall in 720 minutes.

How fast can one team member paint a square wall of 3600 square feet?

720 * (3600/4800) = 540 minutes

Now how fast would it take 9 team members?

540 / 9 = 60 minutes.

Which matches KIson!

CalculatorUser Feb 9, 2020