The length, breadth and height of a cuboid are 18 cm, 24 cm and 4 cm respectively. The volume of cube is equal to the volume of given cuboid. The side of the cube is:

12 cm

We know that,

The volume of cuboid = l × b × h 

The volume of cube  = Side³

We have,

Length = 18cm

breadth = 24 cm

height = 4 cm

Volume of cuboid = 18 × 24 × 4 = 1728

We also know that,  volume of cube = volume of cuboid

(Side)³ = 1728

Side = 12 cm