Answer:
320in²
Step-by-step explanation:
Labelled diagram shown above.
Surface area : base × height
The surface area of most of the sides will be the same because the sides are the same.
Top/bottom = 5 × 8 = 40 + 40 = 80in²
Side/Side = 5 × 10 = 50 + 50 = 100in²
Front/Back = 8 × 10 = 80 + 80 = 160in²
Add them all together.
160 + 100 + 80 = 340in²
