Question

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

Answer 1

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