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Calculating Heights and Distances

A man in a bo...

Question

A man in a boat rowed away from a cliff 150 meters high takes 2 minutes to change the angle from 60 to 45. The speed of the boat is______

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Solution

v = $\frac{d i s t a n c e}{t i m e}$ = $\frac{150 (c o t 45^{0} - c o t 60^{0})}{2}$

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