The formula mc022-1.jpg gives the length of the side, s, of a cube with a surface area, sa. how much longer is the side of a cube with a surface area of 480 square meters than a cube with the surface area of 270 square meters?

This is the concept of scale factors; To get how much longer the length of one cube is compared to another, we are required to find their length;
The surface area of the cube is given by:
A=6a^2
Thus;
a=√(A/6)
The length of the cube with SA of 480 m^2 will be:
a=√(480/6)
a=8.944 m

The length of the cube with SA of 270 m^2
a=√(270/6)
a=6.71 m

The larger cube is longer than the smaller one by:
8.94-6.71=2.23 m