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A small island is 3 miles from the nearest point P on the straight shoreline of...

A small island is 3 miles from the nearest point P on the straight shoreline of a large lake. If a woman on the island can row a boat 3 miles per hour and can walk 4 miles per​ hour, where should the boat be landed in order to arrive at a town 11 miles down the shore from P in the least​ time?

The boat should be landed _____miles down the shore from P.

Math   Calculus   
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So the boat should land 3.4 miles from point P.

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