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NDA2013MathematicsThree Dimensional GeometryActual

If the projections of a straight line segment on the coordinate axes are 2,3,6 , 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 = p^2+q^2+r^2 = 2^2+3^2+6^2 = 49 =7 units.

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