The correct answer is 54 CUBIC. The following information are given in the question: Height, H = 9 feet Diameter, B = 6 feetV Volume of cylinder = ? The formula for finding the volume of a cylinder is: V = BH, Where, V is the volume, B is the diameter and H is the height. V = 6 * 9 = 54. Therefore V = 54 Cubic feet.