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 minutes for the angle of depression to change from `30^0to45^0,` how soon after this will the car reach the tower? Give your answer to the nearest second.

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 minutes for the angle of depression to change from 30^(0) to 45^(0) ,how soon after this will the car reach the tower? Give your answer to the nearest second.

A man on the top of a vertical observation tower observes a car moving at a uniform speed coming directly towards it. If it takes 12 minutes for the angle of depression to changed from 30^@ to 45^@ , how soon after this will the car reach the observation tower? Give your answer correct to the nearest second.

A person from the top of a hill observes a vehicle moving towards him at a uniform speed. It takes 10 minutes for the angle of depression to change from 45^(@) to 60^(@) . After this the time required by the vehicle to reach the bottom of the hill is:

A man on the top of a tower,standing on the seashore,finds that a boat coming towards him takes 10 minutes for the angle of depression to change from 30o to 60o. Find the time taken by the boat to reach the shore from the position.

A man on the top of a tower: standing on the seashore: finds that a boat coming towards him takes 10 min for the angle of depression to change from 30^(@) to 60^(@). Find the time taken by the boat to reach the shore from this position