At a point A that is 50 m from the base of a monument, the angle of elevation to the top of the monument is twice as large as the angle of elevation from a point B that is 150 m from the monument.
At a point A that is 50 m from the base of a monument, the angle of elevation to the top of the monument is twice as large as the angle of elevation from a point B that is 150 m from the monument. Assuming that the base of the monument and the points A and B are in the same line on level ground, find the height of the monument.
| A. $50 \sqrt{3}$ | C. $40 \sqrt{3}$ |
| B. $25 \sqrt{3}$ | D. $45 \sqrt{3}$ |
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