The formula to find the volume of a cone is 1/3 h.
But lets simply find the volume of the circle first. 15 x 15 is 225. Lets put 3.14 as . So 225 x 3.14 is 706.5. The volume of a cylinder would be 706.5 x 9 is 6358.5.
A cone is 1/3 of a cylinder, so 6358.5 /3 is 2119.5