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If lines 12 x + 5y + 16 = 0 " and " 12 ...

If lines ` 12 x + 5y + 16 = 0 " and " 12 x + 5y - 10 = 0 ` both
touch the same circle , then radius radius of this circle is

A

1

B

2

C

3

D

4

Text Solution

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The correct Answer is:
A
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MARVEL PUBLICATION-CIRCLE AND CONICS -MULTIPLE CHOICE QUESTIONS
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  4. Abscissas and ordinates of points A and B are roots of equation x^(...

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  7. If circles x^(2) + y^(2) = 9 " and " x^(2) + y^(2) + 2ax + 2y + 1 = ...

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  10. Centre of circle , passing through (0,0) ,(a,0) and (0,b) , is

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  11. If line 2x - y + k = 0 is a diameter of circle x^(2) + y^(2) + 6...

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  12. Determine equation of the circle whose diameter is the chord x + y = 1...

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  13. If (h,k) is the centre of a circle passing through the origin then its...

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  14. If circles (x -1)^(2) + y^(2) = a^(2) " and " (x + 2)^(2) + y^(2) = ...

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  15. The centre of circle inscribed in a square formed by lines x^2-8x+1...

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  16. The radius of the circle, having centre at (2, 1), whose one of the ch...

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  17. Find the equation of the circle which touches the circle x^(2) + y^(...

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  18. If circles x^(2) + y^(2) + 2g(1)x + 2f(1)y = 0 and x^(2) + y^(2) ...

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  19. The locus of the point whose co-ordinates are x = 3 cos theta + 2 ...

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  20. The radius of the circle t^(2) x^(2) + t^(2) y^(2) - 2at^(3) x - 2...

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