XAB and XCD are two secants to a circle. If XA = 18 cm, AB = 22 cm and XC = 24 cm, then find the value of XD (in cm).
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 30.
According to the given question,
Let the length of XD be x cm.
XA × XB = XC × XD
⇒ 18 × 40 = 24 × x
⇒ x = 30