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NDA2014MathematicsHeights and DistancesActual

A lamp post stands on a horizontal plane. From a point situated at a distance 150 m from its foot, the angle of elevation of the top is 30^ . What is the height of the lamp post?

Options

  1. A50 m
  2. B50 3 ~m
  3. C50 3 ~m
  4. D100 m

Correct answer

B. 50 3 ~m

Step-by-step solution

aligned 30^ & = h 150 1 3 & = h 150 aligned h= 150 3 3 3 =50 3 ~m Height of the lamp post =50 3 ~m .

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