Mathematics · 2015
JEE Main · 10 April 2015, Shift 1 · Q80
If y+3 x=0 is the equation of a chord of the circle, x^2+y^2-30 x=0, then the equation of the circle with this chord as diameter is:
If $\displaystyle y+3 x=0$ is the equation of a chord of the circle, $\displaystyle x^2+y^2-30 x=0$, then the equation of the circle with this chord as diameter is :
Official answer
(2)
$\displaystyle x^2+y^2-3 x+9 y=0$
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JEE Main 2015 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.