Question

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 $30^\circ$ to $45^\circ$, then how soon, after this, will the car reach the tower?

• A. 14 minutes 23 seconds
• B. 16 minutes 23 seconds
• C. 15 minutes 23 seconds
• D. 17 minutes 23 seconds

Answer 1

Answer: (B)

16 minutes 23 seconds

Answer 2

The correct option is (B) : 16 minutes