The volume of a cone is ¹/₃ × π × r² × l. To calculate the volume we multiply these values together. The answer will be written in [units]³. Sphere. The volume of a sphere is ⁴/₃ × ...

Let's assume both a basketball and a balloon have a diameter of 20 cm. Calculating the volume and plugging into the F air equation, I get an upward-pushing force of 0.049 newtons. That's tiny .