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December 19, 2014

December 19, 2014

Posted by **Tina** on Sunday, November 27, 2011 at 5:57pm.

- Algebra -
**Henry**, Monday, November 28, 2011 at 7:34pmT = t1*t2 / (t1+t2),

T = 45*55 / (45+55) = 24.75Min.

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