The surface area of a cuboid is 84 square centimeters. Cut it into three equal cubes. The surface area of each cube is () square centimeters

The surface area of a cuboid is 84 square centimeters. Cut it into three equal cubes. The surface area of each cube is () square centimeters

Three cubes have 18 identical faces. The surface area of a cuboid is equal to the sum of the surface areas of three cubes minus the area of four coincident faces
So the surface area of a square is 84 / (18-4) * 6 = 36 square centimeters
Key points: when three cubes are combined into a cuboid, two faces of each adjacent cube are pasted together, and the faces pasted together are not the surface area of the cuboid. It is required to separate the surface area of the cuboid. As long as you know how many faces constitute the surface area of the cuboid, you can find the area of one face of each cube, and then multiply by 6 is the surface area of the cuboid