APFIVE Related Rates Shadow Problem
A person 5 feet tall walks away from a 15-foot-tall streetlight at a constant rate of 3 feet per second. At the moment the person is 10 feet from the base of the streetlight, what is the rate, in feet per second, at which the tip of the person’s shadow is moving away from the base of the streetlight?
A
$$3$$
B
$$\frac{15}{2}$$
C
$$6$$
D
$$\frac{9}{2}$$
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