Question

Use the net to find the surface area of the cylinder, give your answer in terms of pi.

Answer 1

The correct answer is last option

surface area = 104 yd²

Explanation:

Formula:

Surface area of cylinder = 2πr² + 2πrh

Where r is the radius and h is the height of cylinder

To find the surface area of cylinder

Here r = 4 yd and h = 9yd

Surface area = 2πr² + 2πrh = 2π * 4 * 4 + 2π *4 *9

= 32π + 72π = 104π yd²

Therefore the total surface area of given cylinder = 104π yd²

The correct answer is last option .

Answer 2

`104\pi yds`

Explanation:

The total surface area of the cylinder is

`T.S.A=2\pi r^2 +2\pi rh`

We substitute
`r=4yd,h=9yd` to obtain;

`T.S.A=2\pi * 4^2 +2\pi 4* 9`

`T.S.A=32\pi +72\pi`

`T.S.A=104\pi yds`