Answer:
Step-by-step explanation:
Surface area ⇒ area of 2 triangles + area of 3 rectangles
I'm guessing you want the volume?
so for a triangle it's 1/2 base * height for the area
1/2 * 8 * 3 = 12
12*20=240 m^3
63
2+1= 3
15-3= 12
12 x 3 = 36
99 - 36
= 63
I dunno this one, u should