A plane flies at a speed 600 km hr at a constant height of 19 km How rapidly is the angle of elevation to the plane changing

Question

A plane flies at a speed 600 km hr at a constant height of 19 km How rapidly is the angle of elevation to the plane changing when the plane is directly above a point 140 km away from the observer The angle of elevation is changing at positive value Round your answer to 3 decimal places radians hr enter a

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