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September 20, 2014

September 20, 2014

Posted by **joe** on Monday, July 22, 2013 at 5:05pm.

- chem -
**Steve**, Monday, July 22, 2013 at 5:10pmsince time = distance/speed, and the times are equal,

Assuming nautical miles, so knots make sense,

70/(20+s) = 45/(20-s)

s = 100/23 = 4.35 knots

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