Surface area of a rectangular prism

Find the area of every face and add them.

1. A rectangular prism is 3 cm long, 6 cm wide and 8 cm tall. What is its surface area in cm²?
2. A rectangular prism is 9 cm long, 3 cm wide and 2 cm tall. What is its surface area in cm²?
3. A rectangular prism is 2 cm long, 8 cm wide and 10 cm tall. What is its surface area in cm²?
4. A rectangular prism is 6 cm long, 6 cm wide and 9 cm tall. What is its surface area in cm²?
5. A rectangular prism is 12 cm long, 9 cm wide and 9 cm tall. What is its surface area in cm²?
6. A rectangular prism is 11 cm long, 15 cm wide and 5 cm tall. What is its surface area in cm²?
7. A rectangular prism is 12 cm long, 5 cm wide and 8 cm tall. What is its surface area in cm²?
8. A rectangular prism is 10 cm long, 12 cm wide and 5 cm tall. What is its surface area in cm²?
9. A rectangular prism is 5 cm long, 9 cm wide and 4 cm tall. What is its surface area in cm²?
10. A rectangular prism is 5 cm long, 3 cm wide and 16 cm tall. What is its surface area in cm²?
11. A rectangular prism is 13 cm long, 2 cm wide and 7 cm tall. What is its surface area in cm²?
12. A rectangular prism is 6 cm long, 17 cm wide and 13 cm tall. What is its surface area in cm²?
13. A rectangular prism is 20 cm long, 14 cm wide and 24 cm tall. What is its surface area in cm²?
14. A rectangular prism is 16 cm long, 12 cm wide and 6 cm tall. What is its surface area in cm²?
15. A rectangular prism is 18 cm long, 29 cm wide and 11 cm tall. What is its surface area in cm²?
16. A rectangular prism is 13 cm long, 12 cm wide and 21 cm tall. What is its surface area in cm²?
17. A rectangular prism is 40 cm long, 3 cm wide and 9 cm tall. What is its surface area in cm²?
18. A rectangular prism is 5 cm long, 15 cm wide and 5 cm tall. What is its surface area in cm²?
19. A rectangular prism is 7 cm long, 40 cm wide and 2 cm tall. What is its surface area in cm²?
20. A rectangular prism is 22 cm long, 37 cm wide and 12 cm tall. What is its surface area in cm²?