200.96 mi²
Explanation:
The shape is a cylinder.
Surface area of a cylinder = 2πr² + 2πrh = 2πr(r + h)
r = radius = 4 mi
h = height = 4 mi
let π = 3.14
Surface area of a cylinder = 2×3.14 × 4 (4 + 4)
= 25.12(8)
Surface area of a cylinder = 200.96 mi²
