Answer:
volume = 202.5 cubic meters
Explanation:
We need to find volume of square pyramid, given 7.5m as the height and base of 9m each side (square base).
The image is attached.
We can use the formula to find volume of square pyramid. The formula is:

Where
x is the base (here it is 9 meters)
h is the height (which is given as 7.5 meters)
We substitute and find the volume:

The volume = 202.5 cubic meters