To determine an answer mathematically, find
the volume of
each cylinder. The volume is the area
of the base times
the height. In this case, the bases are circular.
of a circle is
r or approximately 3.14
r. To find the radius,
r, use a ruler to
estimate the width (or diameter) of the circle. Divide
the diameter by 2 to get the radius.
Another way to find the radius
of a circle is to use the formula:
Circumference = 2 ×
radius = 2r.
Radius = Circumference ÷
Once you have the radius, the table below shows how to
determine the volume of each cylinder. The sheet of paper
is 8 1/2 inches by 11 inches.
of the shorter cylinder
is about 82 cubic
inches, and the volume
of the taller cylinder
is about 63 cubic inches.