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Frequency927. A straight highway leads to the foot of a tower. A man standing at the top of the towerobserves a car at an angle of depression of 30°. which is approaching the foot of thetower with uniform speed. Ten seconds later, the angle of depression of the car isfound to be 60°. Find the time taken by the car to reach the foot of the tower from thispointORdh of eleation of a tower is 60°, and

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