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A 6.00​-ft-tall man walks at 7.00 ​ft/s toward a street light that is 15.0 ft above...

A 6.00​-ft-tall man walks at 7.00 ​ft/s toward a street light that is 15.0 ft above the ground. At what rate is the end of the​ man's shadow moving when he is 10.0 ft from the base of the​ light? Use the direction in which the distance from the street light increases as the positive direction.

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