The first train leaves the station at 6:00 am with a speed of 60 km/hr. The second train leaves at 7:15 am, in the same direction from the same station, with a speed of 75 km/hr. What time will the second train catch the first train? Choose the correct choice from the following answers:	A) 11:15 am	B) 11:45 am	C) 12:15 pm	D) 12:45 pm	E) 1:15 pm
In seventy-five minutes, the first train travels 75 km.   The second train catches the first train with a relative speed of 15 km/h.   The second train will catch the first train in 5 hours.   The second train will catch the first train at 12:15 pm.   The answer is 12:15 pm.
<result>C</result>
The first train leaves the station at 6:00 am with a speed of 60 km/hr. The second train leaves at 7:15 am, in the same direction from the same station, with a speed of 75 km/hr. What time will the second train catch the first train?