SOLUTION: Working together, Kim and Chris can paint a room in 3 hours. Working alone, Chris can do the job in 5 hours. How long will it take Kim to do the job alone?
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Question 1158130: Working together, Kim and Chris can paint a room in 3 hours. Working alone, Chris can do the job in 5 hours. How long will it take Kim to do the job alone? Answer by ikleyn(52767) (Show Source):
Working together, they do of the job per hour.
Working alone, Chris makes of the job per hour.
Hence, Kim makes - = = of the job per hour.
Hence, Kim will complete the job in hours = 7 hours = 7 hours and 30 minutes. ANSWER
