Question: A man 2 m tall walks horizontally at a constant rate of 1 m/s toward the base of a tower 25 m tall. When the

A man 2 m tall walks horizontally at a constant rate of 1 m/s toward the base of a tower 25 m tall. When the man is 10 m from the tower, at what rate is the angle of elevation changing if that angle is measured from the horizontal to the line joining the top of the man's head to the top of the tower? 

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