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December 22, 2014

December 22, 2014

Posted by **Tonto** on Tuesday, March 23, 2010 at 5:06pm.

- math -
**Reiny**, Tuesday, March 23, 2010 at 5:11pmLet the speed of the stream be x km/h

Time to go upstream = 60/(8-x)

time to go downstream = 60/(8+x)

so 60/(8-x) + 60/(8+x) = 16

multiply both sides by (8-x)(8+x), simplify and solve the resulting quadratic equation.

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