Question

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

Answer 1

Answer:

Lateral Surface Area = 15.072 $mm^2$

Step-by-step 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 = $2\pi rh$

$\Rightarrow LSA = 2 \times 3.14 \times 1.2 \times 2\\\Rightarrow LSA = 6.28 \times 2.4\\\Rightarrow LSA = 15.072\ mm^2$

So, the answer is:

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

Answer 2

Answer:

LSA  =   24.1

Step-by-step 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