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Question: Answered & Verified by Expert
If a plane cuts off intercepts $-6,3,4$ from the co-ordinate axes, then the length of the perpendicular from the origin to the plane is
MathematicsThree Dimensional GeometryJEE Main
Options:
  • A $\frac{1}{\sqrt{61}}$
  • B $\frac{13}{\sqrt{61}}$
  • C $\frac{12}{\sqrt{29}}$
  • D $\frac{5}{\sqrt{41}}$
Solution:
2938 Upvotes Verified Answer
The correct answer is: $\frac{12}{\sqrt{29}}$
Equation is $\frac{x}{-6}+\frac{y}{3}+\frac{z}{4}=1$ or $-2 x+4 y+3 z=12$
$\therefore$ Length of perpendicular from origin
$=\frac{12}{\sqrt{4+16+9}}=\frac{12}{\sqrt{29}} .$

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