SOLUTION: john can finish painting his room in 6 hours while it takes thomas 9 hours to paint the same room . working together , how long does it take them to finish the job?

Question 757961: john can finish painting his room in 6 hours while it takes thomas 9 hours to paint the same room . working together , how long does it take them to finish the job?
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
John takes 1/6 hour to do a job
Thomas takes 1/9 hour to do a job
1/6 + 1/9 = 1/x
Denominator = 54x
9x + 6x = 54
15x = 54
x = 54/15
x = 3.6hours
x = 3hours 36mins.
Hope this helps.
:-)
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