1.

From three collinear points A, B and C on a level ground, which are on the same side of a tower, the angles of elevation of the top of the tower are 30°, 45° and 60° respectively. If BC = 60 m, then AB is:

A. \(\rm15\sqrt{3}\) m
B. \(\rm30\sqrt{3}\) m
C. \(\rm45\sqrt{3}\) m
D. \(\rm60\sqrt{3}\) m
Answer» E.


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