This rectangular prism is made up of one-unit cubes. Find the surface area of the rectangular prism

square units

Surface Area of a Rectangluar Prism = 2(Length×Width+Width ×Hight+Length × Hight)

= (8 × 12 + 12 × 4 + 8 × 4) × 2

= 176 × 2

= 352