November 29, 2015

Homework Help: Answer Check Please

Posted by William on Thursday, September 30, 2010 at 4:47pm.

Andy and William work together to build a toy house. It will take William 5 hours and Andy 4 hours, or William 10 hours and Andy 2 hours to finish their work. If William works alone, how many hours will it take to finish his work?

I say 15 is the answer.

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