The surface area of the net is 56 m²
How to find the surface area
The total surface area of the net is
= surface area + area of base
Surface area
= 4 * area of triangle
= 4 * 1/2 * base * height
= 4 * 1/2 * 4 * 5
= 40 m²
Area of base
= 4 * 4
= 16 m²
Total surface area
= 40 + 16
= 56 m²