Answer:
171.5 sqft
Step-by-step explanation:
There are 5 surfaces:
2 surfaces as triangle, each with area = 5 x 4.3 /2 = 10.75sqft
3 suraces as rectangle, each with area = 10 x 5 = 50sqft
Total surface area = 50 x 3 + 10.75 x 2 = 150 + 21.5 = 171.5 sqft
