1)

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 change from 30° to 45°, how soon after this will the car reach the observation tower ?


A) 14 min. 35 sec.

B) 15 min. 49 sec.

C) 16 min. 23 sec.

D) 18 min. 5 sec.

Answer:

Option C

Explanation:

Height&distance_10.jpg