Thursday
September 18, 2014

Homework Help: math word problem

Posted by M.A. on Tuesday, September 28, 2010 at 8:16am.

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?
5
10
15
20

Explain how you arrived at the answer.

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