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A person is running along a beach (assume flat ground, no incline) at a constant speed...

A person is running along a beach (assume flat ground, no incline) at a constant speed of 10km per hour. The runner notices a light house in the distance whose top shows an angle with the horizon of 1.55◦ . 2 minutes later, the angle is at 3.9 ◦ . What is the height in meters of the light house when we assume that the eyes of the runner are 1.4m above the ground?

Math   Precalculus   
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