SOLUTION: Sam can paint the classroom in 5 hours and working with Sal they can paint the room in 3 hours. How long does it take sal to paint the room alone?

Question 1030798: Sam can paint the classroom in 5 hours and working with Sal they can paint the room in 3 hours. How long does it take sal to paint the room alone?
Answer by ikleyn(52792) (Show Source): You can put this solution on YOUR website!
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Sam can paint the classroom in 5 hours and working with Sal they can paint the room in 3 hours. How long does it take Sal to paint the room alone?
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Sam's rate of work is    of the room painted surface per hour.

Sams and Sal's combined rate of work is    of the room area per hour when they work together.

Hence, Sal's rate of work is the difference

 =  =  of the room area per hour.

It means that Sal takes  =  hours to pint the room working alone.

For many other similar problems on joint work, you can find their detailed solutions in these lessons
- Using Fractions to solve word problems on joint work
- Solving more complicated word problems on joint work
in this site.

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