Anya started solving for the volume of the pyramid using the steps below. V = one-third B h B = 12 (12) = 144 feet squared A square pyramid with a base of 12 feet by 12 feet and height of 15 feet. What is the final step in determining the volume of the pyramid? V = one-third (144) (15) V = one-third (144) (12) V = one-third (144) V = one-third (12) (15)