In order to calculate the volume of a pyramid, we can use the formula below:
[tex]V=\frac{1}{3}A\cdot h[/tex]
Where A is the base area and h is the height.
Since the base is a square, the area is the side length squared:
[tex]A=12^2=144\text{ m^^b2}[/tex]
Now, calculating the volume, we have:
[tex]\begin{gathered} V=\frac{1}{3}\cdot144\cdot5\\ \\ V=240\text{ m^^b3} \end{gathered}[/tex]
Therefore the correct option is A.
