125
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cube of 1, cube of 2,cube of 3, cube of 4, cube of 5
An increase of 20% equates to 20/100 = 1/5 A cube of side length 5 units increases to 5 + 5/5 = 5 + 1 = 6. The volume of the new cube is thus 6³ = 216 cubic units.
The length of a side (edge) of a cube is equal to the cube root of the volume. So, in this case the cube root of 125 is 5. Thus, each edge of the cube is 5 cm long.
125 is a perfect cube because 5*5*5 = 125
125