Asked by john9999
The radius of a circular oil spill is increasing at a rate of 10 feet per hour. How quickly is the surface area changing when the radius is 200 feet?
Answers
Answered by
bobpursley
area= PI r^2
darea/dt=PI 2 r dr/dt
solve for d(area)/dt. You know r, and dr/dt
darea/dt=PI 2 r dr/dt
solve for d(area)/dt. You know r, and dr/dt
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