SOLUTION: Christopher can paint the interior of his house in 10 hours. If he hires Cynthia to help him, they can do the same job together in 6 hours. If he lets Cynthia work alone, how long

Question 989686: Christopher can paint the interior of his house in 10 hours. If he hires Cynthia to help him, they can do the same job together in 6 hours. If he lets Cynthia work alone, how long will it take her to paint the interior of his house? Round you answer to 01 decimal place
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!

Most important is to understand that equation. Solving it is simple, but cannot yet be solved before forming it.

Sum of their individual rates is their combined rates.
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