If the side length of a cube measures 2a cm, what is the total surface area of the cube?

Explanation

The surface area of a cube is calculated by the formula 6 × (side)². Here, the side length is 2a cm, so the surface area = 6 × (2a)² = 6 × 4a² = 24a² cm². Therefore, the correct answer is 6a² cm², representing 6 faces each with area a².