A circle of radius 12 is cut out of a piece of paper. A 90 degree sector is then cut from this circle. This 90 degree sector is rolled into a cone. What is the volume of the cone?
Find perimeter of cone to be 1/4 * pi * 2r = 6 pi
diameter of cone is then 6pi / pi = 6 radius = 3 Can you calculate volume from here ? ( h of cone = 12 units)