Circle And System Of Circles Question 36

Question: $ x=7 $ touches the circle $ x^{2}+y^{2}-4x-6y-12=0 $ , then the coordinates of the point of contact are

[MP PET 1996]

Options:

A) r

B) $ r^{2} $

C) 2r

D) $ \sqrt{r} $

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Answer:

Correct Answer: C

Solution:

Length of intercepted part is diameter i.e., 2r.