If two concentric circles are of radii 13 cm and 12 cm, respectively, then the length of the chord of the larger circle which touches the smaller circle is:
Answer & explanation
Correct answer: option 2
We know that,
(Perpendicular)2 + (Base)2 = (Height)2
We have,
OA = 13 cm and OM = 12 cm then,
AM2 = 132 - 122 = 25 cm
= AM = 5 cm
AB = 5 + 5 = 10 cm