The volume of a cube is numerically equal to its surface area. What is the length of its side?

6 units

Volume of a cube = l³cu. units surface area of a cube 6l²sq. units,where ‘l’ is the length of each side of a cube.

Given that the volume of a cube is numerically equal to its surface area ⇒ l³cu. units = 6l²sq. units

$⇒\frac{l^3}{l^2}=6$ ⇒ l = 6 units

The length of each side of the cube = 6 u nits.