Total volume of the two spherical caps of two intersecting spheres

Description

A spherical cap or spherical dome is a portion of a sphere cut off by a plane. If the plane passes through the center of the sphere, so that the height of the cap is equal to the radius of the sphere, the spherical cap is called a hemisphere. The total volume of the two spherical caps of two intersecting spheres of differend radii can be calculated by the radii of the bases of the caps and their heights.