Find the length of the base of a square pyramid if the volume is 1,024 cubic inches and has a height of 12 inches

Let 's x the length of the pyramid:
V=x²*h/3
V=1024 and h=12
So x²*12/3=1024
==>x²=1024*3/12
==>x²=256
==>x²=16²
==> x=16 for (x=-16 must be exclude <0)

brainpower pts pls

The method to find the female dormitory is 2-d=800