Question

At apoint on level ground the angle of elevation of top of vertical tower is tangent 5/12

Answer 1

Here tangent means tan theta okay
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Answer 2

first case:-

tan@=5/12 = height of tower /distance (d) ---------------(1)

second case:-

3/4 = height of tower /(d-192)-------(2)

from equation (1) and (2)

3 (d-192)/4=5d/12

9 (d-192)=5d

9d - 1728=5d

4d=1728

d=432 m

now

height of tower =5 x 432/12 =5x36=180 m