11. From the top of a 200 meters high building, the angle of depression to the bottom of a second building is 20 degrees. From the same point, the angle of elevation to the top of the second building is 10 degrees. Calculate the height of the second building.

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A: We can simplify the expression as below.

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A: This question is related to trigonometric ratios, we will solve it using given information.

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