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The elevation of the top of a tower from a point on the ground is $45^{0}$ . On travelling 60m from the point towards the tower, the elevation of the top becomes $60^{0}$. The height of the tower ( in metres ) is1). 302). $30(3-\sqrt{3})$3). $30(3+\sqrt{3})$4). $30\sqrt{3}$ |
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