Answer:
Explanation:
The given pyramid is a square based pyramid. The formula for determining the lateral surface area of a square base pyramid is expressed as
Lateral surface area = 1/2 × perimeter × slant height
From the information given,
Length of each side = 11 miles
Perimeter of base = 4 × 11 = 44 miles
Slant height = 6.8 miles
Lateral surface area = 1/2 × 44 × 6.8 = 149.6 miles²
The formula for determining the total surface area of a square base pyramid is expressed as
Total surface area = base area + (1/2 × perimeter × slant height)
Base area = 11² = 121
Total surface area = 121 + (1/2 × 44 × 6.8) = 270.6 miles²