A prism has a volume of 225 cubic meters. A prism has a length of 7.5 meters, width of w, and height of 5 meters. Which is the correct substitution for finding the width of the prism? V = l w h. 225 = 7.5 + w + 5. V = l w h. 5 = 15 times 225 times h. V = l w h. 7.5 = 7.5 times w times 5. V = l w h. 225 = 7.5 times w times 5.