campus placement TCS NQT Mock Test (Cognitive Ability) Quantitative Aptitude Geometry Circles, Chords and Tangents
Two concentric circles are of radii 15 cm and 6 cm. What is the length (in cm) of the chord of the larger circle that is tangent to the smaller circle?
1
4√21
2
9√21
3
6√21
4
3√21