Question 351851
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 = {{{7.5/5}}}
t = 1.5 hrs for 5 to complete the job