6 1/2 - 3 1/4 = 13 / 2 - 13 / 4 = 26 / 4 - 13 /4 = 13 / 4 is the distance;
A = 50
For the other one it is 100
If you are looking for z then z is 55
0.6431 if not rounded off
0.6432 if rounded off
In order to find the surface area of a cube, you need to find the area of one of the sides.
15*15 = 225
this would then be multiplied by 6 to account for all of the sides of the cube.
225*6 = 1350 millimeters ^2