You find the surface area of a cube by using the formula 6e2. In this case, e=edge.
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Total surface area of a cube = 6*area of cube face = 6*cube side*cube side
Zero. A cube does not have a curved surface area.
It depends on the 3D figure say u have a 3x3 cube 3x3=92 ,92x 6 (that's how many sides are on a cube) =542 There is your suface area of a 3x3 cube
If we remove a cube from the corner then cavity we get to see can be considered in the form of a cuboid room and the room doesn't has roof and front wall because the cube is removed from the corner(you can consider any two surfaces).Let us say the side of larger cube be A then its surface area is 6A2.And we have removed a cube of side a from the corner. After removing we get 4 squares of side a in the cavity and the area is 4 x a2. But the roof and front wall is not there so there is decrease in area by 2 x a2.So, the surface area of new figure is 6A2 + 4a2 - 2a2 = 6A2 + 2a2.So the surface area of new figure is more than the original cube.
If a is the side,lateral surface area of cube=4a2