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KVPY2013MathematicsCircle

Tangents to a circle at points P and Q on the circle intersect at a point R . If P Q=6 and P R=5 then the radius of the circle is

Options

  1. A13 3
  2. B4
  3. C15 4
  4. D16 5

Correct answer

C. 15 4

Step-by-step solution

In R C P = 4 5 In PCO = 3 r

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