Solution
We are to find the volume of the square pyramid
[tex]\begin{gathered} \text{The }volumeofthesquarepyramid\text{ =}\frac{1}{3}a^2h \\ \text{Where a is the area of the base} \\ \text{where h is the height} \\ \text{Given } \\ h\text{ =7.5m L=9} \\ a^2=l^2 \\ a^2=81 \\ \text{The }volumeofthesquarepyramid=\frac{1}{3}\times81\times7.5 \\ \\ \text{The }volumeofthesquarepyramid=202.5\text{ cubic meters} \end{gathered}[/tex]