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| 1. |
The angle of elevation of the top of a tower from a point A on the ground is 30°. On moving a distance of 20 metres towards the foot of the tower to a point B, the angle of elevation increases to 60°. The height of the tower in meters is |
| A. | √3 |
| B. | 5√3 |
| C. | 10√3 |
| D. | 20√3 |
| Answer» D. 20√3 | |