The total surface area of a cube would be 6 x area-of-one-cube-face (there are 6 faces to a cube). Each face of a cube is a square. If any edge of the cube is "a", then: 6 x a x a.
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Total Surface Area of Cube is 6a2 . Here "a" is the "length of each side" of the cube.
Total surface area of a cube = 6*area of cube face = 6*cube side*cube side
Total Surface Area = 6L2. Where L = the length of one side of the cube.
The cube's total surface area is 294cm2
That is the definition of the surface area!