Answer:
side of the cubic box is 6 cm
Explanation:
The volume of a box for earrings is 216 cubic centimeters.
Volume of a cubic box is

, where 'a' is the side of the cubic box

Take cube root on both sides
![\sqrt[3]{216} =\sqrt[3]{a^3}](https://img.qammunity.org/2018/formulas/mathematics/middle-school/7b1cw0jziv2i2ljag1evg5wiavrmp79sbu.png)
Cube and cube root will get cancelled
So 6=a
The side of the cubic box is 6 cm