A prism has a volume of 238 cubic millimeters. A prism has a length of l millimeters, height of 3 and one-half millimeters, and width of 8 and one-half millimeters. Which is the correct substitution for finding the length of the prism? V = l w h. 238 = l + 8 and one-half + 3 and one-half V = l w h. V = 238 times 8 and one-half times 3 and one-half V = l w h. l times 8 and one-half times 3 and one-half V = l w h. 238 = l times 8 and one-half times 3 and one-half