We know that the volume of a triangular pyramid is: V= 1/3*A*H
In which A is the base of the pyramid and H is the height of the pyramid.
If we were to find what the area of the pyramids base is, we would need to do A=V÷H*3
In this case it would be, A= 300÷3*3
so the answer is 300 cubic meters. Hope this helped!