A cube has 6 equal square faces. Area of one face = 52 × 52 = 2704. Total surface area = 6 × 2704 = 16224 square m. Total surface area means the combined area of all outside faces. A cube has 6 equal square faces, so after finding one face area, multiply by 6. The answer is in square units, so the correct choice is 16224 m².