The largest among the distances from the point $P(15,9)$ to the points on the circle $x^2+y^2-6 x-8 y-11=0$ is

The largest among the distances from the point $P(15,9)$ to the points on the circle $x^2+y^2-6 x-8 y-11=0$ is
  1. 12
  2. 13
  3. 19
  4. 7

Solution

$x^2+y^2-6 x-8 y-11=0, P(15,9)$ Centre $(C)=(3,4)$ $\text { Radius }=\sqrt{9+16+11}=6 ; C P=\sqrt{(15-3)^2+(9-4)^2}=13$ $\therefore$ Greatest distance $=13+6=19$

Asked in: AP EAMCET 2024 (20 May Shift 2)

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