8. At a point on level ground, the angle of the elevation of the top of a vertical tower is found to be such that its tangent is 5/12. On walking 192 metres towards the tower, the tangent of the new angle of elevation is found to be. Find the height of the tower.
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The angle of elevation of the top of a tower from a point on the same level as the foot of the tower is 30∘. On advancing 150 m towards the foot of the tower, the angle of elevation becomes 60∘. Show that the height of the tower is 129.9 metres. [Take √3=1.732.]
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