Question 640201
If it takes three painters four hours to paint seven walls,
 how many hours would it two painters to paint three walls?
:
Find the number of man-hrs required to paint one wall
:
man-hrs = {{{(3*4)/7}}}
mh = {{{12/7}}} to paint one wall
:
"how many hours would it two painters to paint three walls?"
let h = no. hrs required to accomplish this
2h = 3*{{{12/7}}}
2h = {{{36/7}}}
h = {{{36/7}}}*{{{1/2}}}
h = {{{36/14}}}
h = {{{18/7}}} = 2.57 hrs or 2 + .57(60) = 2 hrs 34.2 min