The radius of your cone is half of 18 units = 9 units.
The volume of any cone is <span><span>V = (1/3) · (pi) · (radius)² · (height) </span> </span> -- Take that formula for the volume of any cone. -- Write '8' in place of 'height'. -- Write '9' in place of 'radius'. -- Write '3.142' in place of 'pi'. -- Complete the arithmetic. -- Bada-bing, you've got the volume.
