# Calculate the Volume of a Sphere

In this worksheet, students will calculate the volume of spheres, given their radii or diameters.

Key stage:  KS 3

Curriculum topic:   Geometry and Measures

Curriculum subtopic:   Use 3D Shape Knowledge to Solve Problems

Difficulty level:

#### Worksheet Overview

In this activity, we are going to calculate the volume of a sphere!

You will need a scientific calculator for this activity

A sphere is a ball.

Every point on the surface is the same distance from the centre. (The radius)

To find the volume we use this formula:

Volume = 4/3 x π x (radius)3

in short:

V = 4/3πr3

Let's look at a question.

Example

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

Volume =  4/3πr3 = 4 ÷ 3 x π x 43

Use the π  button on your calculator!

V =  268.1 cm3 (1 dp)

Let's have a go at some questions now.

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