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JEE Main & Advanced Sample Paper JEE Main Sample Paper-14

  • question_answer
    Let axis and latusrectum of a parabola intersect at (1, 1). If the equation of directrix is \[5x+12y+22=0,\] then the length of latus  rectum is

    A)  3                                            

    B)  6

    C)  9                                            

    D)  12

    Correct Answer: B

    Solution :

     Clearly, focus = (1, 1) Distance of focus from diretrix \[=\frac{5\times 1+12\times 1+22}{13}=22\] \[\therefore \] Length of latusrectum \[=2\times 3=6\]


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