railway DMRC CRA Mock Test Series Quantitative Aptitude Trigonometry Heights and Distances

A and B are two points observed from the top of a tower 10√3 m high. If the angles of depression of the points are complementary and AB = 20 m, then the distance of B from the building is

1
25 m
2
45 m
3
30 m
4
40 m
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