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All of the members of our spray-painting team paint at the same speed. If 12 team members can paint a 2400 square foot wall in 45 minutes, then how many minutes would it take for 9 team members to paint a 3600 square foot wall?

 Sep 19, 2018
 #1
avatar+18457 
+4

2400 sq ft / 45 minutes/12 members  =   4.44 sq ft / min/member   (each member can  paint 4.44 sqft/min)

 

3600 sq ft   /  ( 4.44 sqft/min/mem   *   9 members)  = 90 mins

 Sep 19, 2018
edited by ElectricPavlov  Sep 19, 2018
 #2
avatar+4296 
+2

12t, 2400 ft, 45m

1t, 2400ft, 540m

9ft, 2400ft, 60m

9ft, 1ft, 1/40m

9ft, 3600ft, 1/40*3600=360/4=\(\boxed{90}\) minutes!

smileysmiley

 Sep 19, 2018
 #3
avatar+144 
+1

Great! Thanks guys!

 Sep 19, 2018

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