SOLUTION: The surface area of a right circular cylinder of height 4 feet and radius r feet is given by S(r)=2πrh+2πr2. Find the instantaneous rate of change of the surface area wit
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Question 1102748: The surface area of a right circular cylinder of height 4 feet and radius r feet is given by S(r)=2πrh+2πr2. Find the instantaneous rate of change of the surface area with respect to the radius, r, when r = 4.
A) 24π
B) 16π
C) 64π
D) 20π
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Take the derivative of the surface area function with respect to r,
So when ,
Work that out for the solution.
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