A runner starts running from a point at 6:00 am with a speed of 7 km/hr. Another runner starts from the same point at 8:00 am in the same direction with a speed of 14 km/hr. At what time of the day will the second runner will overtake the other runner?
1
10:30 am
2
9:30 am
3
10 am
4
10:15 pm