The length of the common chord of the two circles of radii `10,24` whose centers are `26` units aparts is

The length of the common chord of two circles of radii 15 and 20, whose centres are 25 units apart, is

The length of the common chord of two circles of radii 15 cm and 20 cm whose centres are 25 cm apart is (in cm).

Two equal circles intersect such that each passes through the centre of the other. If the length of the common chord of the circles is 10sqrt3 cm, then what is the diameter of the circle?

Let two circles having radii r_(1) and r_(2) are orthogonal to each other. If the length of their common chord is k times the square root of harmonic mean between the squares of their radii, then k^(4) is equal to

The length of a common internal tangent to two circles is 5 and a common external tangent is 15, then the product of the radii of the two circles is :