Question

Find the surface area of each figure round your answers to the nearest hundredth if necessary

Answer 1

Answer: 410 square km

Step-by-step explanation:

The area of each of the triangles with their base on the 10 km side is $A=\frac{1}{2}(10)(13.4)$, so their combined area is $(10)(13.4)=134$.

The area of each of the triangles with their base on the 12 km side is $\frac{1}{2}(12)(13)$, so their combined area is $(12)(13)=156$.

The area of the bottom rectangular face is $10(12)=120$.

So, the total surface area is $120+156+134=\boxed{410 \text{ km}^{2}}$