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Question

The equation of circle concentric with circle x2+y26x+12y+15 = 0 and double its area is


A

x 2+y2-6x+12y-15=0

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B

x 2+y2-6x+12y+20=0

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C

x 2+y2-6x+12y+45=0

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D

x 2+y2-6x+12y-30=0

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Solution

The correct option is A

x 2+y2-6x+12y-15=0


x2+y26x+12y+15 = 0

C = (3,-6) ,r = (30)

(x3)2+(y+6)2 = 60

x2+y26x+12y15 = 0


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