All cone-shaped cups have the same height in 8 inches. They just differ in their diameters. To solve for the volume of the regular and jumbo sizes, let's use the formula for the volume of cone
V = (1/3)pi(r^2)h
r is just the half of the diameter, h is the height which is equal to 8
Regular size:
V = (1/3)pi((4/2)^2)8
V = 33.5 cube inches
Jumbo size:
V = (1/3)pi((8/2)^2)*8
V = 134.0 cube inches
