Find the surface area and volume of a 9 dm cube.

1. A cube is a three-dimensional figure, the surface of which consists of 6 squares. The side of each square is the edge of the cube.

2. The volume of a cube is equal to the product of its length, width and height, which, according to the problem statement, are equal to 9 dm., Which means that the volume is 9 * 9 * 9 = 729 dm3.

3. The area of the side of the cube is the area of the square, that is, 9 * 9 = 81 dm2.

4. According to paragraph 1, the surface area of the cube is 6 * 81 = 486 dm2.