Question

how to find volume of cubes with its edge

Answer 1

a^3 is the answer of yours

Answer 2

How to find the volume of a cube

Recall that a cube has all edges the same length. The volume of a cube is found by multiplying the length of any edge by itself twice. So if the length of an edge is 4,the volume is 4 x 4 x 4 = 64

Or as a formula:

volume = s3where:
s  is the length of any edge of the cube.