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A speedboat travels on a calm lake at a speed of 25 mi/hr, on a heading...

A speedboat travels on a calm lake at a speed of 25 mi/hr, on a heading of 68° east of north. It leaves the south shore of the lake (whose shoreline is uniformly straight along an east-to-west line) at 10:00 am. How far from the shore will the boat be at 10:10 am?

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Answer #1

Distance from shoreline = v*t

= 25 mi/hr *10/60 hr* cos 68 degree

= 4.1667 mi * cos 68 degree

= 1.56 mi answer

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