Q. A circle has its centre at O . A tangent drawn from a point P , which is situated outside the circle, touches the circle at A. If PA = 4 cm & PO=5 cm, then the length of the radius of the circle is
A) 2 cm
B) 1 cm
C) 4 cm
D) 3 cm
✔ Correct Answer: 3 cm
Exam Insight
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