If a circle C passing through


If a circle $C$ passing through $(4,0)$ touches the circle $x^{2}+y^{2}+4 x-6 y-12=0$ externally at a point $(1,-1)$, then the radius of the circle $C$ is :-

  1. $\sqrt{57}$

  2. $2 \sqrt{5}$

  3.  4

  4. 5

Correct Option: , 4


Leave a comment


Click here to get exam-ready with eSaral

For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.

Download Now