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January 31, 2015

January 31, 2015

Posted by **Angel** on Sunday, June 12, 2011 at 7:40pm.

- Math -
**MathMate**, Sunday, June 12, 2011 at 9:49pmWhat can be added is the rate of work.

This is how much work each finishes in an hour.

Ben's rate + Ted's rate

= 1/6+1/11

= 17/66

Together they do 17/66 of the work in an hour.

So time it takes to get the work done

= 1/(17/66)

= 66/17

= 3 15/17 hours

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