Find the volume of a cube whose edge is 0.3 decimetres.

Given:

a = 0.3 dm;

V =? cm³

1 dm = 10 cm; 0.3 dm = 3 cm.

The volume of a cube is calculated by the formula: V = a³, where a is an edge. The volume of the cube is the length multiplied by the width and height, for a cube all these parameters are equal, so the side is raised to the third power.

V = a³ = 3³ = 9 (cm³)

Answer: 9 cm³ cube volume.