Calculate the volume of cylinders
for 8th grade

Calculate the volume of cylinders

A cylinder is a form of prism which means that it has a fixed cross section throughout it's length. The volume of prisms is calculated by multiplying the area of the cross-section by the length. Since a cylinder has a circular cross section, the volume of cylinders can be calculated using the formula:

V = π x r² x L

For example, if we have a cylinder with a length of 6 cm and a cross-section radius of 4 cm, the volume of that cylinder will be:

V = π x 4² x 6 = 301.59 cm³

Notes on this topic

This topic asks you to calculate the volume of different sized cylinders. The questions give you both the height of the cylinder and either the area of the cross-section or it's radius. When you are given the area, the calculations can be done in your head, but when given the radius you will require a calculator. All decimal answers must be given to 2 decimal places.