Determine the missing value for this pyramid with a square base

Question

V= Bh/3

The height of the pyramid is 9ft.

The Volume is 243 ft³

What is the length of one side of the base?

Answer 1

V = (1/3) ( Base area) ( height)

V = (1/3) ( S*S)(height) <--- area of the square base is the measure of the it's side but squared

243 = (1/3) ( s*s)(9

243 = 3 (s*s)

81 = s*s

s = 9