Answer:
364m^2
Explanation:
Surface area is calculated by adding the area of each face.
Because this is a cubiod, there are 6 sides in pairs of identical area.
4m × 5m = 20m^2
4m × 18m = 72m^2
5m × 18m = 90m^2
90m^2 +72m^2 +20m^2 = 182m^2
This is 3 faces of the 6, so double it.
182m^2 ×2 = 364m^2