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AP EAMCET20228 Jul 2022Morning ShiftMathematicsCircleActual

The ratio of the areas of the concentric circles x^2+y^2-6 x+12 y+15=0 and x^2+y^2-6 x+12 y-15=0 is

Options

  1. A1: 2
  2. B1: 3
  3. C1: 2
  4. D1: 4

Correct answer

C. 1: 2

Step-by-step solution

Given C₁=x^2+y^2-6 x+12 y+15=0 and C₂=x^2+y^2-6 x+12 y-15=0 r₁= 30 and r₂= 60 Now ratio of their areas =1: 2

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