we know that
Volume of a pyramid=(1/3)*[Area of the base]*height
area of the base-----> is a square base
length of the side=s units
so
Area of the base=s² units²
height=h units
substitute the values in the formula above
Volume of a pyramid=(1/3)*[s²]*h-----> volume=(s²*h)/3 units³
therefore
the answer is
v=(s²*h)/3 units³