A vertical line separates the solid figure into two rectangular prisms. Which expression shows the volume of the solid figure? A rectangular prism beside another longer rectangular prism. The left prism measures 16 inches by 5 inches by 4 inches. The right prism measures 4 inches by 4 inches by 8 inches. (4 × 5 × 8) + (4 × 4 × 16) (4 × 5 × 16) + (4 × 4 × 8) (4 × 5 × 20) + (4 × 4 × 8) (4 × 5 × 8) + (4 × 4 × 20)