Janey paints a block of wood with gold glitter for an art project. The block measures 8 inches by 10 inches by 20 inches.

Question

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 area of each cut surface and why?

Answer 1

The area of each cut surface is 80 square inches, because the cut surface is a rectangle with dimensions 8 inches by 10 inches. The area of a rectangle is calculated by multiplying the length and width, which in this case is 8 x 10 = 80.