SOLUTION: three people painting a wall takes 2.5 hours. how many hours does it take for five people to paint the wall?

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Question 351851: three people painting a wall takes 2.5 hours. how many hours does it take for five people to paint the wall?
Found 2 solutions by ankor@dixie-net.com, solver91311:
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
three people painting a wall takes 2.5 hours.
how many hours does it take for five people to paint the wall?
:
We can use man-hrs here
:
3*2.5 = 7.5 man-hrs to complete the job
:
Let t = time for 5 to do it
:
5t = 7.5
t = 7.5%2F5
t = 1.5 hrs for 5 to complete the job

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


If three people take 2.5 hours, then one person would take 3 times as long, or 7.5 hours, and then 5 people would take 1/5 of that, or 1.5 hours.


John

My calculator said it, I believe it, that settles it
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