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Posted by on Wednesday, February 1, 2012 at 1:34am.

A kayak moves 10 miles per hour in still water. If the river current flows at 5 miles per hour, how long does it take reach 26 miles upstream?

  • math - , Wednesday, February 1, 2012 at 5:09pm

    The upstream speed is 10-5 = 5mph.
    So, it will take 26/5 hours to go upstream 26 miles.

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