Three circles touch one another externally. The tangent at their points of contact meet at a point whose distance from a point of contact is 4 . The ratio of the product of the radii to the sum of the radii of the circles is
8
16
4
32
Let P, Q and R be the centre of the circles and O the point of intersection of the common tangents at A, B and C.
...[1]
...[2]
Now, from (1) and (2)
Study 40% syllabus and score up to 100% marks in JEE