The total surface area S of a right circularcylinder is related to the base radius r and height h by theequation S = 2πr2 + 2πrh. How is dS/dt related to dr/dt and dh/dt if neither r nor h isconstant?

Mathematics For Machine Technology
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ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter65: Achievement Review—section Six
Section: Chapter Questions
Problem 44AR: Solve these prism and cylinder exercises. Where necessary, round the answers to 2 decimal places...
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The total surface area S of a right circular
cylinder is related to the base radius r and height h by the
equation S = 2πr2 + 2πrh. How is dS/dt related to dr/dt and dh/dt if neither r nor h is
constant?

Expert Solution
Step 1

We have to find dSdt related to drdt and dhdt where neither r nor h is constant

and total surface area S=2πr2+2πrh.

Differentiating the total surface area S with respect t,

dSdt=d2πr2+2πrhdt

Separating each parts and taking constants outside of the derivative,

dSdt=d2πr2dt+d2πrhdt=2πdr2dt+2πdrhdt

 

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ISBN:
9781337798310
Author:
Peterson, John.
Publisher:
Cengage Learning,