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December 20, 2014

December 20, 2014

Posted by **coran** on Friday, August 30, 2013 at 1:59am.

- maths -
**Steve**, Friday, August 30, 2013 at 4:40amsince John's speed is 5/4 Jack's, his time is 4/5 of Jack's.

That is, 20% less

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