Question

Find the lateral surface area of a cylinder whose radius is 1.2 mm and whose height is 2 mm

Answer 1

LSA = 24.1

Explanation:

I just did this, I dont know how to upload my work, but It marked it as right and gave me the green check mark. The answer is 24.1

Answer 2

Lateral Surface Area = 15.072
`mm^2`

Explanation:

Given that:

Base of Cylinder has radius, r = 1.2 mm

Height, h = 2 mm

To find:

Lateral Surface area of cylinder = ?

Solution:

We know that total surface area of a cylinder is given by:

`TSA = 2\pi r^2+2\pi rh`

Here
`2\pi r^2` is the area of two circular bases of the cylinder and

`2\pi rh` is the lateral surface area.

Please refer to the attached image for a better understanding of the Lateral and Total Surface Area.

So, LSA =
`2\pi rh`

`\Rightarrow LSA = 2 * 3.14 * 1.2 * 2\\\Rightarrow LSA = 6.28 * 2.4\\\Rightarrow LSA = 15.072\ mm^2`

So, the answer is:

Lateral Surface Area of given cylinder = 15.072
`mm^2`