SOLUTION: If Sally can paint a house in 4 hours and John can paint the same house in 6 hours. How long will it take them to paint the house together? Can someone please tell me how to solve

Question 305903: If Sally can paint a house in 4 hours and John can paint the same house in 6 hours. How long will it take them to paint the house together? Can someone please tell me how to solve this?
Found 2 solutions by richwmiller, Earlsdon:
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
This same problem has appeared daily for a week now.
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
1) Find the hourly rate of each painter.
If Sally can paint the house in 4 hours, then she can paint of the house in 1 hour.
If John can paint the house in 6 hours, then he can paint of the house in 1 hour.
2) Find the hourly rate when working together.
Together, they can paint of the house in 1 hour.
3) Find the time to paint the entire house together.
They can paint the whole house in hours or 2 hours and 24 minutes.
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