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March 3, 2015

March 3, 2015

Posted by **cr7** on Monday, January 3, 2011 at 5:54pm.

- ALgebra word problem -
**Reiny**, Monday, January 3, 2011 at 6:03pmSusan's rate = 1/3

Jerry's rate = 1/2.5

combined rate = 1/3 + 1/2.5 = 11/15

so time taken to do one chair = 1/(11/15) = 15/11

so to do 10 chairs will take 10(15/11) hours

or 13.636 hours. or 13 hours and appr. 38 minutes

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