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A light at the top of a 20-ft pole creates a shadow for a 6-ft person walking away at 4 ft/s. How fast does the shadow lengthen when the person is 10 ft from the pole?
A light at the top of a 20-ft pole creates a shadow for a 6-ft person walking away at 4 ft/s. How fast does the shadow lengthen when the person is 10 ft from the pole?