SOLUTION: Art can paint a set of kitchen cabinets in 3 hours. His father can do it in 1 hour. How long will it take them if they work together?

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Question 375969: Art can paint a set of kitchen cabinets in 3 hours. His father can do it in 1 hour. How long will it take them if they work together?
Answer by bostonmathtutor(8) About Me  (Show Source):
You can put this solution on YOUR website!
Set up the problem using the information you have (1 hour, 3 hours, 2 people)
(1/3) + (1/1) = (2/X)
Now, solve for X:
4/3 = 2/X
4X = 6
X = 0.75
Or X = 45 minutes.