What is the face area of a cube whose edge is 30 cm. What is the surface area of such a cube?

Each face of a cube is a square with a side equal to a face of the cube. Its area is equal to the square of the side:
30 * 30 = 900.
The surface area of a cube is equal to the sum of the areas of all its faces. To determine the number of sides of a cube, just remember the dice. A number is written on each of its faces, and there are 6 numbers in total, which means that the cube has 6 faces. Therefore, to get the surface area of a cube, you need to multiply the area of one face by 6:
900 * 6 = 5400.
Answer: the area of one face is 900, the surface area is 5400.