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Question: Answered & Verified by Expert
The length of the perpendicular from the origin to the plane $\bar{r}$. $(3 \hat{i}-4 \hat{j}+12 \hat{k})=8$ is
MathematicsThree Dimensional GeometryMHT CETMHT CET 2022 (07 Aug Shift 2)
Options:
  • A 8 units
  • B $\frac{13}{8}$
  • C $\frac{8}{13}$
  • D 13 units
Solution:
1845 Upvotes Verified Answer
The correct answer is: $\frac{8}{13}$
The required length of perpendicular $=\frac{8}{\sqrt{3^2+(-4)^2+12^2}}=\frac{8}{13}$

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