JCECE Engineering JCECE Engineering Solved Paper-2009

  • question_answer
    Find the equation of plane through the line\[\frac{x-2}{2}=\frac{y-3}{3}=\frac{z-4}{5}\]and parallel to \[x-\]axis.

    A) \[2x+3y+5z=1\]

    B) \[2x-5y=4\]

    C) \[5y-3z-3=0\]    

    D) \[3y+4z=0\]

    Correct Answer: C

    Solution :

    Let the equation of plane containing the line                 \[\frac{x-2}{2}=\frac{y-3}{3}=\frac{z-4}{5}\]is                 \[a(x-2)+b(y-3)+c(z-4)=0\] Since, the normal to the plane is perpendicular to the above line:                 \[2a+3b+5c=0\]                ... (i) Also, plane is parallel to x-axis                 \[a=0\]                                                 ... (ii) \[\therefore \]From Eqs. (i) and (ii), we get                 \[3b+5c=0\] \[\Rightarrow \]               \[\frac{b}{5}=\frac{c}{-3}\] \[\therefore \]  \[0(x-2)+5(y-3)-3(z-4)=0\] \[\Rightarrow \]               \[5y-3z-3=0\]


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