+0  
 
0
82
4
avatar

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?

 Feb 9, 2020
 #1
avatar+4 
+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

 Feb 9, 2020
 #2
avatar+78 
0

-----

 

 

Hi there...

 

Great answer.

Personally, if I posted an answer to this I would do the calculation based in "seconds"  first and then finish it off by dividing by 60 to get "minutes", but it would yield the same results.
 

 

Kind regards

BizzyX

 

 

-----

BizzyX  Feb 9, 2020
 #3
avatar
0

60 minutes?!indecision!!!wink

 Feb 9, 2020
 #4
avatar+2847 
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!

 Feb 9, 2020

23 Online Users

avatar
avatar