From a height of h units, a man observes the angle of elevat

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CDS-I 2018 Elementary Maths(PYSP)
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59

M: +1.00/-0.33

From a height of h units, a man observes the angle of elevation as α and angle of depression as p of the top and the bottom respectively of a tower of height H (> 4h). To what further height should he climb so that the values of angle of elevation and angle of depression get interchanged for the top and bottom of the tower?

[CDS-I 2018 Elementary Maths(PYSP)]

A H – h units

B H – 2h units

C H – 3h units

D H – 4h units