Calculate the rate at which the length of the shadow of a 6 ft-tall person is…

MATHEMATICS · Subjective · AP · Calculus AB · Contextual Applications of Differentiation · Contextual Applications of Differentiation

Problem

Calculate the rate at which the length of the shadow of a 6 ft-tall person is increasing at the instant the person is 10 ft from the base of a 15 ft streetlamp, if the person walks directly away from the lamp at 3 ft/s. State your answer with units.

Related theory

Basic Proportionality Theorem
Similarity
Related Rates
Rates of change
Rate of change of quantities

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