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A tower stands at the centre of a cir...

A tower stands at the centre of a circular park. A and B are two points on the boundary of the park such that `A B""(=""a)` subtends an angle of `60^@` at the foot of the tower, and the angle of elevation of the top of the tower from A or B is `30^@` . The height of the tower is (1) `(2a)/(sqrt(3))` (2) `2asqrt(3)` (3) `a/(sqrt(3))` (4) `asqrt(3)`

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A tower stands at the centre of a circular park. A and B are two points on the boundary of the park such that AB(=a) subtends an angle of 60^(@) at the foot of the tower,and the angle of elevation of the top of the tower from A or B is 30^(@). The height of the tower is (1) (2a)/(sqrt(3)) (2) 2a sqrt(3)(3)(a)/(sqrt(3))(4)a sqrt(3)

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The angle of elevation of the top of a tower from a point 40 m away from its foot is 60^(@) . Find the height of the tower.

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