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A circle is concentric with the circle ...

A circle is concentric with the circle
` x^(2) + y^(2) - 6x + 12y + 15 = 0`
and has area double of its area. Its equation is

A

`x^(2) + y^(2) - 6x + 12y -15 = 0 `

B

`x^(2) + y^(2) - 6x + 12y + 15 = 0 `

C

`x^(2) + y^(2) - 6x + 12y + 45 = 0 `

D

none of these

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The correct Answer is:
A
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MARVEL PUBLICATION-CIRCLE AND CONICS -MISCELLANEOUS MCQs
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  2. Equation of the circle passing through the three points (0, 0) , (0...

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  3. A circle is concentric with the circle x^(2) + y^(2) - 6x + 12y + ...

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  5. the equation of the circle passing through the point (2,1) and touchin...

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  6. Equation of the circle which passes through the origin and cuts off in...

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  7. If the radius of the circel x ^(2) + y ^(2) + 2gx+ 2fy +c=0 be r, then...

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  8. Equation of the circle with centre on X-axis , radius 5, and passing t...

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  9. The equation of the circel which touches X-axis at (3,0) and passes th...

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  10. The equation ax^(2) + 2bxy + 2y^(2) + 2x - y + c = 0 represents a ...

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  11. Equation of the circle , centred at the origin , whose radius equals t...

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  12. If the equation of a circle which touches the line x = y at the origin...

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  13. A circle x ^(2) + y^(2) + 2gx + 2fy + c=0 passing through(4,-2) is co...

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  14. If the equation x^(2) + y^(2) + 2gx + 2fy + c = 0 represents a circl...

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  15. Equation of the circle with centre (-4,3), and touching the circle ...

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  16. Equation of the circle concentric with the circle x^(2) + y^(2) - ...

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  17. Radius of the circle x^2 +y^2 + 2xcos theta + 2y sin theta-8=0, is

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  18. If the equation (K(x+1)^(2))/(3) + ((y + 2 )^(2))/(4) =1 represents a ...

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  19. The focus of the parabola 4y^(2) + 12x - 20y + 67 = 0 is

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  20. The equation of the directirx of the parabola y^2+4y+4x+2=0 is

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