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MHT CET202015 Oct 2020Morning ShiftMathematicsCircleActual

If the radius of a circle x²+y²-4 x+6 y-k=0 is 5, then k =

Options

  1. A-12
  2. B-25
  3. C25
  4. D12

Correct answer

D. 12

Step-by-step solution

Given equation of circle is array l x²+y²-4 x+6 y-k=0 r = 4+9+k 5= 13+k 13+k=25 k=12 array

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