JEE Main & Advanced Mathematics Three Dimensional Geometry Question Bank System of Co-ordinates, Direction cosines and direction ratios, Projection

  • question_answer
    The distance of the point  (4, 3, 5) from the y-axis is   [MP PET 2003]

    A)            \[\sqrt{34}\]

    B)            5

    C)            \[\sqrt{41}\]

    D)            \[\sqrt{15}\]

    Correct Answer: C

    Solution :

               Distance from y-axis is \[\sqrt{{{x}^{2}}+{{z}^{2}}}\]            = \[\sqrt{{{4}^{2}}+{{5}^{2}}}\] = \[\sqrt{16+25}\] = \[\sqrt{41}\].


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