Mathematics, 04.11.2019 08:31 crzyemo865
Acylinder has a radius of 7 inches and a height of 20 inches. which is closest to the surface area
of this cylinder?
517 sq in
769 sq in
1,187 sq in
3,077 sq in
Answers: 2
![\bf \stackrel{\textit{surface area of a right-circular cylinder}}{SA=2\pi r(h+r)~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ r=7\\ h=20 \end{cases}}\implies SA=2\pi (7)(20+7) \\\\\\ SA=14\pi (27)\implies SA=378\pi \implies \boxed{SA\approx 1187.52}](/tpl/images/0358/6873/b0b0b.png)
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Acylinder has a radius of 7 inches and a height of 20 inches. which is closest to the surface area
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