[tex]V= \frac{lwh}{3} [/tex]
where [tex]lw[/tex] is the area [tex]A[/tex].
Set this to 160 and multiply by three:
[tex]Ah=480[/tex]
Now, think of two numbers that multiply together to make 480. One possible solution could be that the base area is 12 square feet, and the height is 40 feet.
Or you could have the base as 1 square foot, and the height as a whopping 480 feet (which wouldn't make for a good pyramid at all)!
Two solutions I would use:
1: base area 12 square feet, height 40 feet.
2: base area 24 square feet, height 20 feet.
