By what least number must 21600 be multiplied so as to make it perfect cube ?

A. 6

B. 10

C. 20

D. 30

Answer: Option B

Solution(By Examveda Team)

$$21600 = {2^5} \times {3^3} \times {5^2}$$
To make it a perfect cube, it must be multiplied by (2 × 5), i.e., 10