Mathematics

Problem

If the angle of intersection at a point where the two circles with radii 5 cm and 12 cm intersect is

90^\circ

, the length (in cm) of their common chord is : (1)

\frac{60}{13}

(2)

\frac{120}{13}

(3)

\frac{13}{2}

(4)

\frac{13}{5}