JEE Math Practice Question
The line 2x $$-$$ y + 1 = 0 is a tangent to the circle at the point (2, 5) and the centre of the circle lies on x $$-$$ 2y = 4. Then, the radius of the circle is :
- A.5$$\sqrt 3 $$
- B.4$$\sqrt 5 $$
- C.3$$\sqrt 5 $$
- D.5$$\sqrt 4 $$
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