What is the surface area of the solid right circular...
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- gillissm11
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Hi AAPL,What is the surface area of the solid right circular cylinder with height 10 above?
A. 18Ï€
B. 32Ï€
C. 60Ï€
D. 78Ï€
E. 90Ï€
The OA is D
Please, can any expert assist me with this PS question? I don't have it clear and I appreciate if any explain it for me. Thanks.
Let's take a look at your question.
$$Radius=r=3$$
$$Height=h=10$$
We know that the surface area of right circular cylinder can be calculated using the formula:
$$=2\pi r\left(r+h\right)$$
$$=2\pi\left(3\right)\left(3+10\right)$$
$$=6\pi\left(13\right)$$
$$=78\pi$$
Therefore, Option D is correct.
Hope it helps.
I am available of you'd like any follow up.
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The surface area of the cylinder is:
SA = 2Ï€r^2 + 2Ï€rh
SA = 2Ï€(3)^2 + 2Ï€ * 3 * 10
SA = 18Ï€ + 60Ï€ = 78Ï€
Answer: D
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