ABSTRACT
To understand the concept of volume, divide a cuboid into smaller units, as shown in Figure 12.1. Each small unit, a cube, measures 1 cm 1 cm 1 cm.
Volume of a cuboid Length Width Height
or Volume, V l w h
Volume of the unit cube 1 cm 1 cm 1 cm
1 cm3
In Figure 12.1a, there are 18 unit cubes
Volume of the cuboid 1 cm3 18 18 cm3
Using the formula, V l w h
3 2 3 18 cm3
Two other formulae that may also be used to calculate the volume of an object are:
Volume Area Length/Width
Volume Area Height
These relationships are used to find the volume of triangular prisms, cylinders and other solids, which have uniform cross-section.
