Circle concentric with a given circle satisfying one more condition
This type of question, asked 5 times: 3 May 2023 S1, 4 May 2023 S2, 9 May 2023 S2, 16 May 2023 S1, 13 Apr 2026 S2. All 5 questions below, oldest first.
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Question 1
3 May 2023 S1
127
The equation of the concentric circle, with circle C1 having equation x2+y2−6x−4y−12=0 and having double the area of C1, is
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Question 2
4 May 2023 S2
146
The equation of the circle which passes through the centre of the circle x2+y2+8x+10y−7=0 and concentric with the circle 2x2+2y2−8x−12y−9=0 is
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Question 3
9 May 2023 S2
133
The equation of the circle, concentric with the circle x2+y2−6x−4y−12=0 and touching the X-axis is
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Question 4
16 May 2023 S1
130
The equation of the circle, concentric with the circle 2x2+2y2−6x+8y+1=0 and double of its area is
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Question 5
13 Apr 2026 S2
59
The equation of the circle concentric with circle x2+y2−6x+7=0 and which touches the line x+y+3=0 is ....
