Answer:
Explanation:
We can label the surfaces as 1, 2, and 3. There should be 2 of each number. then we do X time Y, Y time Z, and Z time X. In this case, you should get 192, 320, and 140. then you have to times each number by 2 since there is another rectangle like it. we get 384, 640, and 280. then we add them together to get 1304 units squared.