Answer: 410 square km
Step-by-step explanation:
The area of each of the triangles with their base on the 10 km side is
, so their combined area is
.
The area of each of the triangles with their base on the 12 km side is
, so their combined area is
.
The area of the bottom rectangular face is
.
So, the total surface area is 
Answer:
75"
Step-by-step explanation:
Answer: 58
Step-by-step explanation: You just have to divide 350 and 6
703.4 cmsquare
Hope it helps