All sides (edges) of a cube are of equal lengths. And because of symmetry, any face of the cube can end up as the base. So it is sufficient if we find the area of any one face which would be the (length of any one edge) multiplied by itself. Hence it is
(length of any one edge) x (length of any one edge)
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A cube has all sides equal. The base area of cube = any surface of cube. All sides are squares (since all lengths are equal). So, the base area of cube = length * breadth.
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If the length of each edge of the cube is 's',then the area of each face is s2.
length x width x height.
If the base of a cube is 100cm then the base must measure 10cm by 10cm. so, as it is a cube its height must also be 10cm. Therefore the volume of the cube is 10cm x10cm x10cm which equals 1000 cubic cm.