Question

A cuboid metal box of dimension 90 cm $\times$ 20 cm $\times$ 15 cm was melted and cost into a cube, then the size of the cube is

• A. 27 cm
• B. 60 cm
• C. 30 cm
• D. 8 cm

Answer 1

The correct option is C 30 cm

Since the volume remains constant during melting,

Volume of a cuboidal = volume of a cube

$90\times 20\times 15$ = $x^3$

Value of $x$ on solving = $30cm$

So, the correct option is '$30cm$'.