The volume of one jelly bean is approximated by the volume of a small cylincer 2 cm long and 1.5 cm in diameter Volume of 1 Jelly Bean = h(pi)(d/2)^2 = 2cm x 3 (1.5cm/2)^2 = 27/8 cubic centimers Thus the approximate number of beans in the jar is Number of beans = (.80 x 1000 cubic centimeters)/(27/8 cubic centimeters) = approx 240 jelly beans Have your students try it out with jelly beans and a liter bottle or jar. If you don't have a liter jar, use a quart jar (.95 liter) Solution 2 Have your students construct or visualize a paper cube that measures 1 cubic inch. How many jelly beans will fit in the cube? Approximately 4 How many cubic inches are there in 1 liter?