SOLUTION: John can paint a room in 10 hours by himself. If kelly helps, they can paint the same room in 6 hours. If kelly works alone, how long would it take her to paint the room?
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-> SOLUTION: John can paint a room in 10 hours by himself. If kelly helps, they can paint the same room in 6 hours. If kelly works alone, how long would it take her to paint the room?
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Question 829276: John can paint a room in 10 hours by himself. If kelly helps, they can paint the same room in 6 hours. If kelly works alone, how long would it take her to paint the room? Answer by TimothyLamb(4379) (Show Source):
You can put this solution on YOUR website! ---
rates:
j = 1/10
j + k = 1/6
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j + k = 1/6
1/10 + k = 1/6
k = 1/6 - 1/10
k = 10/60 - 6/60
k = 4/60
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time = 1/rate:
kelly's time = 60/4
kelly's time = 15 hours
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