Answer
$3714.5 \ mm^3$
Work Step by Step
Apply the Pythagorean formula to determine the height of the pyramid.
$h^2=l^2-(\dfrac{b}{2})^2 \implies h=21.06 \ m$
The volume of a square pyramid can be obtained as:
$Volume =\dfrac{1}{3} \times b\times h=\dfrac{1}{3} \times S^2 \times h$
Plug the values of $S$ and $h$ into the formula to obtain:
$Volume=\dfrac{1}{3} \times (23)^2 \times (21.06)\\ =\dfrac{1}{3} \times 529 \times 21.06 \\=3714.5 \ mm^3$
