Question

The dimensions of a metallic cuboid are : 100 cm $\times$ 80 cm $\times$ 64 cm. It is melted and recast into a cube. Find the surface area of the cube.

Answer 1

Volume of cube = Volume of the cuboid

$a^3=100\times 80\times 64$

$a^3=512000$

$a=80$ $cm$

Surface area = $6a^2=38400$ $c{m}^2$