Two trees are standing along the opposite sides of a road. Distance between the two trees is 400 metres. There is a point on the road between the trees. The angles of depression of the point from the top of the trees are 45° and 60°. If the height of the tree which makes 45° angle is 200 metres, then what will be the height (in metres) of the other tree?

Two trees are standing along the opposite sides of a road. Distance between the two trees is 400 metres. There is a point on the road between the trees. The angles of depression of the point from the top of the trees are 45° and 60°. If the height of the tree which makes 45° angle is 200 metres, then what will be the height (in metres) of the other tree? Correct Answer 200√3

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In the figure, H is the height of the other tree.

In triangle AEB, AB = 200/tan45°

⇒ AB = 200 mtr

⇒ BC = 400 - 200 = 200 mtr

In triangle DCB, tan 60° = H/BC

⇒ H = 200√3 mtr

∴ Height (in metres) of the other tree = 200√3 mtr

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