In a sphere, how to find the distance (from the center of the sphere), between the angle 30 deg to 60 deg?

Question

In a sphere, how to find the distance (from the center of the sphere), between the angle 30 deg to 60 deg?

Answer 1

On a sphere, the distance from the center of the sphere to the surface of the sphere is the same regards of angle.  That is the definition of a sphere, a solid whose surface is equidistant from its center.

Since the distance around the sphere is 2(pi)r = 360 degrees ... well, you should be able to take it from there.