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The line 2x - y + 1 = 0 is tangent to ...

The line `2x - y + 1 = 0` is tangent to the circle at the point `(2, 5)` and the centre of the circles lies on `x-2y = 4`. The radius of the circle is

A

`3sqrt(5)`

B

`5sqrt(3)`

C

`2sqrt(5)`

D

`5sqrt(2)`

Text Solution

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The correct Answer is:
A
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