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

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