A swimmer crosses a flowing river of width d to and fro in time t1. The time taken to cover the same distance up and down the stream is t2. If t3 is the time the swimmer would take to swim a distance 2d in still water, then prove that t1 square = t2t3.(adsbygoogle = window.adsbygoogle || []).push({});

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# Homework Help: A GREAT problem

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