Rita is designing a building shaped like a pyramid that's cut off in a plane parallel to its base (this is called a truncated pyramid). The building has a 64 \times 64 \text{ m}64×64 m64, times, 64, start text, space, m, end text square base and is 36\text{ m}36 m36, start text, space, m, end text tall.
The cut off section has a 16 \times 16 \text{ m}16×16 m16, times, 16, start text, space, m, end text square base and is 12\text{ m}12 m12, start text, space, m, end text tall.