From the top of a cliff 300 metres high,...

From the top of a cliff 300 metres high, the top of a tower was observed at an angle of depression `30^@` and from the foot of the tower the top of the cliff was observed at an angle of elevation `45^@`, The height of the tower is

`50(3-sqrt3)m`

`200(3-sqrt3)` m

`100(3-sqrt3)m`

none of these

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