Question

Praksit make a cuboid of sides 5cm, 2cm, 5cm. How many such cuboid will be needed to form a cube?

Answer 1

Volume of cuboid $=l\times b\times h=5\times 2\times 5=50{cm}^3$

To make a cube, the volume of cuboid should be a perfect cube. Therefore, the volume of $50{cm}^3$ should be multiplied by $2\times 2\times 5$ to make a perfect cube. i.e.,

$50\times 2\times 2\times 5=1000$

To, that 20, cuboids are required to form a cube.