Question

What is the surface area of a cylinder with a radius of 5 ft and a height of 2 ft?

Answer 1

Its B.

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Answer 2

`\bf \textit{total surface area of a cylinder}\\\\ SA=2\pi r(h+r)~~ \begin{cases} r=radius\\ h=height\\ -----\\ r=5\\ h=2 \end{cases}\implies SA=2\pi (5)(2+5) \\\\\\ SA=10\pi (7)\implies SA=70\pi`