A cone is 13 the volume of a tube so we have: Volume of a cone =13×πr2×h .....Equation (1). We are given that the diameter is 3 inches. As the radius is 12 the diameter, equation (1) becomes:Volume of a cone =13×π(32)2×h .....Equation(1a). We are told that the height is 5 inches equation (1a)