JEE Math Practice Question
A circle C touches the line x = 2y at the point (2, 1) and intersects the circle C1 : x2 + y2 + 2y $$-$$ 5 = 0 at two points P and Q such that PQ is a diameter of C1. Then the diameter of C is :
- A.$$7\sqrt 5 $$
- B.15
- C.$$\sqrt {285} $$
- D.$$4\sqrt {15} $$
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