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NDA 2013
Exam
NDA
Year
2013
Subject
Mathematics
Chapter
Three Dimensional Geometry

NDA 2013 · Mathematics · Three Dimensional Geometry

If the projections of a straight line segment on the coordinate...

If the projections of a straight line segment on the coordinate axes are 2,3,62,3,6, then the length of the segment is

Options

  1. A5 units
  2. B7 units
  3. C11 units
  4. D49 units

Correct answer

B. 7 units

Step-by-step solution

Length of line segment =p2+q2+r2=22+32+62=49=7=\sqrt{p^2+q^2+r^2}=\sqrt{2^2+3^2+6^2}=\sqrt{49}=7 units.
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