1.

Rajat observes that the angle of elevation of the first floor of a building at a point A on the ground is 30^(@). He moves sqrt(3) units towards the building to the point B and finds that the angle of elevation of the second floor of the building is 60^(@). If each floor has the same height, height of the 7th floor from the ground in units is

Answer»

5
7
21
35

Answer :C


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