Angles of elevatiobn of the top of a tow...

Angles of elevatiobn of the top of a tower from three points (collinear) A,B and C on a road leading to the foot of the tower are `30^(@) ,45^(@)` and `60^(@)` respectively .The ratio of AB to BC is

`sqrt(3): 1`

`sqrt(3): 2`

0.043055555555556

`2: sqrt(3)`

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