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A circle S cuts three circles x^(2) + ...

A circle S cuts three circles ` x^(2) + y^(2) - 4x - 2y + 4 = 0 , x^(2) + y^(2) - 2x - 4y + 1 = 0 " and " x^(2) + y^(2) + 4x + 2y + 1 = 0 ` orthogonally . Then the radius of S is

A

`(sqrt(29))/(8)`

B

`(sqrt(28))/(11)`

C

`(sqrt(29))/(7)`

D

`(sqrt(29))/(5)`

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The correct Answer is:
A
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DIPTI PUBLICATION ( AP EAMET)-EAMCET - 2016 AP-Questions
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