a boy 2 metre tall is standing at some distance from a 30 till building the angle of evolution from his eyes of the top of the building increased from 30 degree to 60 degree as he walks towards building find the distance to walk towards the building
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tan 60 =30-2/ab
root 3 =28/ab
ab = 28/root 3
tan 30 = 28/cb
1/root 3 = 28/ ac + 28/rt 3
ac =28 rt 3 - 28/rt 3
ac =84 - 28/rt 3
ac = 56/rt 3
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