Answer:
The formula for a rectangular pyramid is equal to V=(l*w*h)/3 where "l" represent the length, the "w" represents the width and "h" represents the height.
We have givens such as:
l=15 cm
w=5 cm
h=7 cm
Solving for the volume, we have:
V=(15*5*13)/3
V=325
Solving for prism volume
V=l*w*h
V=15*5*7
V=525
For the composite volume:
CV=325+525
CV=850