Find the surface area of the solid below. Round to the nearest tenth if needed.

Answer:
2400 ft²
Step-by-step explanation:
Base = 30x30=900
Next, we have to find the height of the triangles.
15²+20²=c²
225+400=c²
625=c²
c=√625
c=25
Now we can find the surface area of all 4 triangles.
4(1/2)(30)(25)=1500
900+1500= 2400 ft²