Q250 / 270 · NDA 2013 (Phase 2) · Mathematics

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

  • A
    5 units
  • Correct answer
    B
    7 units
  • C
    11 units
  • D
    49 units

Solution

Length of line segment $=\sqrt{p^2+q^2+r^2}$ $=\sqrt{2^2+3^2+6^2}=\sqrt{49}=7$ units.

Hence, the correct answer is option: 'B'.

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