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On a river there is no current from A to B, but a current from B to C. A man rows down a stream from A to C in 3 hrs and C to A in 7/2 hrs; had there been the same current in all the way as from B to C his journey down stream would have taken 11/4 hrs; find the time his return journey would have taken under the same circumstances.

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    Welcome to math.SE: since you are a new user, I wanted to let you know a few things about the site. In order to get the best possible answers, it is helpful if you say what your thoughts on the problem are so far; this will prevent people from telling you things you already know, and help them write their answers at an appropriate level. Also, many find the use of imperative ("Find") to be rude when asking for help; please consider rewriting your post.2012-05-12
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    maybe it is related somehow to triangle ?2012-05-12

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