A man on the top of a vertical tower observes a car moving at a uniform speed coming directly towards it. If it takes 12 seconds to change the angle of depression from 30 degrees to 60°, then how long will the car take to reach the tower from that point.
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A man on the top of a vertical tower observes a car moving at a uniform speed coming directly towards it. If it takes 12 seconds to change the angle of depression from 30 degrees to 60°,
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