What is the length of cube when its volume is 81?

Answer 1

The volume of a cube is calculated using the formula ( V = s^3 ), where ( s ) is the length of one side of the cube. To find the side length when the volume is 81, you can take the cube root of 81: ( s = \sqrt[3]{81} ). Since ( 81 = 3^4 ), the cube root is ( 3^{4/3} = 3 \times \sqrt[3]{3} ), which is approximately 4.33. Therefore, the length of each side of the cube is approximately 4.33 units.