A street light is on top of a 12 ft tall pole. A woman 6 ft tall walks away from the pole at speed 4 ft/sec on a straight path. How fast is the tip of her shadow moving from 40 ft from the pole?

Question

A street light is at the top of a 12 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 4 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 40 ft from the base of the pole?

Answer 1