Answer:
210m²
Explanation:
We have 2 triangular faces with surface 5m*12m/2 = 30m² each
We have the top face with surface 5m*12m = 60m²
We have the bottom face with surgace 5m*13m = 65m²
And we have the "middle" with surface 5m*5m = 25m²
For a total of
30m² + 30m² + 60m² + 65m² + 25m² = 210m²