Question 118
Two non-intersecting circles. one lying inside the other. are of radii $$r_1$$, and $$r_2$$, and $$r_1$$ > $$r_2$$. If the minimum distance between any two points on their circumferences is s, then the distance between their centres is:
Solution
Let 'a' be the radius of the bigger circle where A is its center, while 'b' is the radius of the smaller circle and B is its center.
's' is the distance between their circumference, and D is the distance between the two centers.
Hence, D = a - (b+s)
