Answer:
43.3 m²
Step-by-step explanation:
The surface area of the pyramid can be calculated as 4 times the area of one face.
So, the area of one face is equal to:

Where b is the base of the triangles and h is the height. So, replacing b by 5 m and h by 4.33 m, we get:

So, the surface area is equal to:

Therefore, the answer is 43.3 m²