Janey paints a block of wood with gold glitter for an art project. The block measures 8 inches by 10 inches by 20 inches. After she's done, she decides to make two blocks by cutting through the block on the red line. She still wants each block to be covered with gold glitter.
What is the total area of the cut surfaces she still needs to paint?

1. What is the shape of each cut surface? What are its dimensions?
2. What is the area of each cut surface?
3. What is the total area Janey still needs to paint? Explain how you found your answer.