1 face = 6x6 = 36 cm2
6 faces = 36x6 = 216 cm2
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Total Surface Area of Cube is 6a2 . Here "a" is the "length of each side" of the cube.
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The surface area of a cube can be calculated by finding the area of each of the cube's six square faces and adding them together. Since all sides of a cube are equal, the area of one face is the side length squared. Therefore, the surface area of a cube with a side length of 8mm is 6 times 8mm squared, which equals 384 square millimeters.
surface area of cube=6*side*side =6*7.2*7.2
The surface area is quadrupled.