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December 22, 2014

December 22, 2014

Posted by **Jerry** on Thursday, December 17, 2009 at 12:01am.

- Alegebra -
**MathMate**, Thursday, December 17, 2009 at 12:37amJerry does 1/9 of the work in one hour.

Ruth does 1/10 of the work in one hour.

Together they do 1/9+1/10 = 19/90 of the work in one hour.

How long would it take them together to finish the work ?

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