Question

Which of the following is the surface area of the right cylinder below?

height 3
radius 8

A. 144pie units squared
B. 192pie units squared
C. 72pie units squared
D. 176pie units squared ​

Answer 1

it is d

Explanation:

Answer 2

D

Explanation:

The surface area is the area of all the surfaces. The surface area of cylinder has the formula:

`SA_(cyl)=2\pi r^2 +2\pi rh`

Where

r is radius

h is height

r is 8

h is 3

Substituting, and keeping
`\pi` as is, we have:

`SA_(cyl)=2\pi r^2 +2\pi rh\\SA_(cyl)=2\pi (8)^2 +2\pi (8)(3)\\SA_(cyl)=128\pi +48\pi\\SA_(cyl)=176\pi`

Thus,

Surface Area =
`176\pi` units squared, answer choice D is right