Volume of pyramid is V = (lwh) / 3.
3
It says it's a square pyramid, so all its sides of its base are the same.
Permiter is 12, so each sides is 3 (12 divided by 3).
Now you know that the length and width are both 3.
Plug it all in the formula.
V = (3*3*9) / 3
V = 81/3
V = 27
The volume is 27ft^3, 27 cubic feet
