Question

Parikshit makes a cuboid of plasticine of sides 5 cm 2 cm 5 cm how many such cuboids will be need to form a cube

Answer 1

volume =5x2x5cm=50
answer is 50

Answer 2

Solution:

Given, side of the cube is 5 cm, 2 cm and 5 cm.

Therefore, volume of cube = 5×2×5 = 50 ..

The prime factorisation of 50 = 2×5×5

Here, 2, 5 and 5 cannot be grouped into triples of equal factors.

Therefore, we will multiply 50 by 2×2×5 = 20 to get perfect square.

Hence, 20 cuboid is needed.