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ngoann4 ngoann4
  • 30-08-2015
  • Mathematics
Answered

A cylindrical can has a volume of 2in^(3). Express the surface area of the can as a function of its radius,r.

Verified Answer :

konrad509
konrad509 konrad509
  • 30-08-2015

\(V=2 \text{ in}^3\\ A=2\pi r (r+h)\\ h=?\\\\ V=\pi r^2h=2\\ \pi r^2h=2\\ h=\dfrac{2}{\pi r^2}\\ A=2\pi r\left(r+\dfrac{2}{\pi r^2}\right)\\ \boxed{A=2\pi r^2+\dfrac{4}{r}}\)

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