A straight highway leads to the foot of the tower .A man standing at the top of the tower observes the car at an angle of depressi

A straight highway leads to the foot of the tower .A man standing at the top of the tower observes the car at an angle of depression of 30degree ,which is approaching the foot of the tower with the uniform speed .six seconds later ,the angle of depression of the car found is to be 60degree.find the time taken by the car to reach the foot of the tower from this point.

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