Math

A man in rowboat 12km from the nearest point A. On a straight shore wishes to reach point B 16km from A along shore.where should he land if he can row 4km/hr and walks 8km/hr.

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  1. He can land anywhere he wants between A and B.

    If you want to find the path of least time, however, you need to minimize

    √(x^2+12^2)/4 + (16-x)/8

    where he lands x km from point A.

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