In a classroom of 33 students, the ratio of boys to girls is 3 : 8. With the ratio you can add both gender and get 11 divide 33 by 11 which is 3 so multiply both 3 and 8 by 3 which makes a ratio of. 9:24
The Formula's for a cylinder is V=r^2h and the volume of a Cone is V=1/3r^2h. So you would know that the volume of a cone is 1/3 the volume of a cylinder.
r^2h and the volume of a Cone is V=1/3