A boy of height 1.7m is standing 30m away from a flagstaff on the same level ground.He observes that the angle of elevation of the top of the flagstaff is 30 degrees.Calculate the height of the flagstaff.

Asked by  | 27th Feb, 2013, 03:21: PM

Expert Answer:

Draw a figure such that AB represents the height of the flagstaff, CD represents the height of the boy. 
Then, as given in the question, CD = 1.7 m, BD = 30m. Draw a line CE parallel to BD intersecting AB at point E. 

Answered by  | 27th Feb, 2013, 08:38: PM

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