What is the surface area?

For the two sides, do find the area by doing 2((base x height) / 2)so..
2.5 x 6 = 15m^2

The base is simply a rectangle so 6 x 10 = 60m^2

The top is 6.5 x 10 = 65m^2

The back is 2.5 x 10 = 25m^2

Add all of these up together to get

15 + 60 + 65 + 25 = 165m^2

Hope this helps! Any questions let me know :)

The correct answer is: 2