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A vertical tree is growing on the side of a hill with gradient 10 degrees to the horizontal. From a point 50 m downhill from the tree, the angle of elevation to the top of the tree is 18 degrees. Find the height of the tree.

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Yuou are given a vertical tree that is growing on the side of a hill with gradient 10 degrees to the horizontal, from a point 50 m downhill from the tree and the angle of elevation to the top of the tree is 18 degrees. The height of the tree is 16.25m.

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