1.

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^(@), 45^(@) and 60^(@) respectively, then the ratio, AB : BC, is

Answer»

`SQRT(3) : 1`
`sqrt(3) : sqrt(2)`
`1 :sqrt(3)`
`2 : 3`

ANSWER :A


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