What is the volume of a cone with a diameter of 20 cm and a height of 15 cm? Use 3.14 for pi.
The radius of the cone is half of the diameter, so the radius is 20 cm / 2 = 10 cm.
The volume of a cone can be calculated with the formula V = (1/3) * π * r^2 * h, where V is the volume, π is 3.14, r is the radius, and h is the height.
Plugging in the values, we get V = (1/3) * 3.14 * 10 cm^2 * 15 cm.
Calculating this equation, we have V = (1/3) * 3.14 * 10 cm^2 * 15 cm = 15.7 cm^2 * 15 cm = 235.5 cm^3.
Therefore, the volume of the cone is 235.5 cm^3. Answer: \boxed{235.5}.