Question

25. Parikshit makes a cuboid of plasticine of sides 5 cm, 2 cm, 5 cm. How many such cuboids will he need to form a cube?

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Answer 1

Answer:

Given numbers =

$5 \times 2 \times 5$

Factors of 5 and 2 both are not in a group of three.

Therefore, the number must be multiplied by =

$2 \times 5 \times 2$ = 20 to make it a perfect cube.

Hence he needs 20 cuboids.

Answer 2

Given numbers =

5 \times 2 \times 55×2×5

Factors of 5 and 2 both are not in a group of three.

Therefore, the number must be multiplied by =

2 \times 5 \times 22×5×2 = 20 to make it a perfect cube.

Hence he needs 20 cuboids.