Prism dimensions:
8 units² (base area)
16 units (height)
Because the dimensions are the same...
Pyramid dimensions:
8 units² (base area)
16 units (height)
The volume for a pyramid = 1/3 ba * h
Substitute and solve.
  1/3 8 * 16
= 1/3 (128)
= 42.66...
Therefore the volume is approximately 42.67cm³