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almond37 [142]
3 years ago
11

Surface area of cylinders

Mathematics
1 answer:
marta [7]3 years ago
7 0

\bf \textit{surface area of a cylinder}\\\\ SA=2\pi r(h+r)~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ r=11\\ h=11 \end{cases}\implies SA=2\pi (11)(11+11) \\\\\\ SA=22\pi (22)\implies \boxed{SA=484\pi} \\\\\\ \begin{cases} r=12\\ h=8 \end{cases}\implies SA=2\pi (8)(8+12)\implies SA=16\pi (20)\implies \boxed{SA=320\pi }

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