Calculate the Volume of a Cylinder

In this activity, we are going to find the volume of a cylinder.

Volume of the cylinder = the area of the circular end x length

We need to first find the area of the circular end:

Area of circle = π r²

So the formula for the volume of a cylinder is: π r² x the length

Let's have a look at a typical question.

Example

Calculate the volume of the cylinder shown below in cm³ to 1 decimal place.

Radius 2 cm

Length = 8 cm

Answer

Radius r =  2 cm

Length = 8 cm

Volume = π r² x length 

Volume = π x 2² x 8 

Volume = 100.5309......

= 100.5 cm³ (1 dp)

Let's try some questions!