The ratio of the speed of a thief and police is 2 : 3. The thief starts running from point A at the speed of 20 km\hr. After how much time will the police catch the thief if he is 4200 meters away from the thief? (Assume the police is chasing the thief in the same direction)
1
8.6 min
2
12.6 min
3
25.2 min
4
24.6 min