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show steps A boy on a skateboard rolls away from a 15-ft lamppost at a speed of 3 ft/sec. The boy's height on the skateboard

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A boy on a skateboard rolls away from a 15-ft lamppost at a speed of 3 ft/sec. The boy's height on the skateboard is 6 feet. Find the rate at which his shadow is increasing in length (answer in ft/sec)

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