A man on the top of a tower observes a car moving towards it. If it takes 10 minutes for the angle of depression to change from 30° to 60°, find the time taken by the car to reach the tower.
Q1. A man on the top of a tower observes a car moving towards it. If it takes 10 minutes for the angle of depression to change from 30° to 60°, find the time taken by the car to reach the tower.
Answer: 5 minutes
Explanation: Using tan 30° and tan 60°, we relate the distances and times to find the remaining time to reach the tower.