SOLUTION: A professional painter can paint the interior of the Jacksons' house in 7 hours. John Jackson can do the same job in 12 hours. How long would it take these two people working toget
Algebra ->
Customizable Word Problem Solvers
-> Geometry
-> SOLUTION: A professional painter can paint the interior of the Jacksons' house in 7 hours. John Jackson can do the same job in 12 hours. How long would it take these two people working toget
Log On
Question 174353: A professional painter can paint the interior of the Jacksons' house in 7 hours. John Jackson can do the same job in 12 hours. How long would it take these two people working together to finish the same job? Round to the nearest minute. Please solve step by step. Answer by Mathtut(3670) (Show Source):
You can put this solution on YOUR website! so prof painter can do 1/7 of the job per hour
and John can do 1/12 of the job per hour
together they can do
:
1/12+1/7=7/84++12/84=19/84 of the job per hour
:
19/84(t)=1
: hours.....which is appx 4.42 hours
(