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Related rates: Shadow, man and lamp post (light post)
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A person 6 feet tall walks at a speed of 5 feet per second toward a light that is
20 feet above the ground. When he is 10 feet from the base of the light post, at what rate is the tip of his shadow moving?
20 feet above the ground. When he is 10 feet from the base of the light post, at what rate is the tip of his shadow moving?
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