Volume

Introduction to Volume

Volumes of a Cube and a Cuboid

Abhinav’s mother gives him a container, asking him to go to the neighbouring milk booth and buy 2.5 L of milk. What does ‘2.5 L’represent? It represents the amount of milk that Abhinav needs to buy. In other words, it is the volume of milk that is to be bought. 

After buying the milk, Abhinav notices that the container is full up to its brim. He says to himself, ‘This container has no capacity to hold any more milk.’ What does the word ‘capacity’ indicate? The space occupied by a substance is called its volume. The capacity of a container is the volume of a substance that can fill the container completely. In this case, the volume and the capacity of the container are the same. The standard units which are used to measure the volume are cm³ (cubic centimetre) and m³ (cubic metre).  

In this lesson, we will learn the formulae for the volumes or capacities of cubic and cuboidal objects. We will also solve examples using these formulae.

Formulae for the Volumes of a Cube and a Cuboid

Consider a cube with an edge a.

The formula for th…