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?
+4 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
+2864 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!
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