The volume of a cone is pi multiplied by the radius squared times the height divided by three.
If 3.14 is used for pi:
V = 3.14 * 15^2 (9/3)
= 3.14 * 15^2 (3)
= 3.14 * 225 * 3
= 706.5 * 3
= 2,119.5 cm cubed
If 3.14 is not used for pi:
V = pi * 15^2 (9/3)
= pi * 15^2 (3)
= pi * 225 * 3
= 706.8583470577035 * 3
= 2,120.57504117311 cm cubed