If the angles of elevation of the top of a tower

Question:

If the angles of elevation of the top of a tower from three collinear points $A, B$ and $C$, on a line leading to the foot of the tower, are $30^{\circ}, 45^{\circ}$ and $60^{\circ}$ respectively, then the ratio, $\mathrm{AB}$ : $B C$, is:

  1. $1: \sqrt{3}$

  2. 2: 3

  3. $\sqrt{3}: 1$

  4. $\sqrt{3}: \sqrt{2}$


Correct Option: , 3

Solution:

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