The total surface area is the area of all of the faces of the prism added together.
Rectangles:
2.5 x 10 = 25
1.5 x 10 = 15
2 x 10 = 20
Triangles:
1/2(2 x 1.5) = 1.5
1/2(2 x 1.5) = 1.5
Surface area:
SA = 25 + 15 + 20 + 1.5 + 1.5
SA = 63 m^2
Hope this helps! :)
