What are the differences between a cube and a rectangular prism in aspects pertaining to volume, surface area?

Answer 1

V(cube) = x³ (x is an edge length)
V(r.p.) = x²y (x is an edge length of two equal sides, y is the edge length of the other side)

SA(cube) = 6x² (x is an edge length)
SA(r.p.) = 2x² + 4xy (x is an edge length of two equal sides, y is the edge length of the other side)