a cube has 6 sides ( front, back, left side, ride side, top and bottom)
calculate the area of one side then multiply that by 6 to get total surface area
using edge length of 4.5 m
the area of one side is equal to 4.5^2 which is 4.5 x 4.5= 20.25 square meters
total surface area = 20.25 x 6 = 121.5 square meters(m^2)
