A circle touches the y-axis at \((0, 4)\) and passes through the point \((-2, 0)\). Then the radius of the circle is
Question and options
A circle touches the y-axis at and passes through the point . Then the radius of the circle is
- 4
- 5
- 6
- 7
Answer and explanation
Correct answer: B - 5
Centre (h,4), radius |h|. (h+2)^2 + 16 = h^2 gives 4h = -20, h = -5, so the radius is 5.
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IPMAT Indore
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