Math Problem Statement
A highway patrol plane flies 4 mi above a level, straight road at a steady 190 mph. The pilot sees an oncoming car and with radar determines that at the instant the line-of-sight distance from plane to car is 5 mi, the line-of-sight distance is decreasing at the rate of 165 mph. Find the car's speed along the highway.
Car's speed is_____ miles per hour
Solution
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Math Problem Analysis
Mathematical Concepts
Related Rates
Differentiation
Pythagorean Theorem
Formulas
s^2 = x^2 + y^2 (Pythagorean Theorem)
2s(ds/dt) = 2x(dx/dt) (Differentiated form of Pythagorean Theorem)
v = (s(ds/dt)) / x
Theorems
Pythagorean Theorem
Suitable Grade Level
Grades 11-12, Early College
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