SOLUTION: If joy can paint a box alone in 6 hours and Gina can paint it in 4 hours. How many hours would it take both to paint the box together?

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Question 929943: If joy can paint a box alone in 6 hours and Gina can paint it in 4 hours. How many hours would it take both to paint the box together?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
r = w/t
rates are additive:
1/6 + 1/4 = 0.41666666666
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t = w/r
1/0.41666666666 = 2.4 hours
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