Subject: mathqa
Question: in what time will two trains cross each other completely , which are running on the same parallel lines in opposite directions , each train running with a speed of 60 kmph being 130 m and 120 m in length respectively ?
Option: 
A: 7.5 sec
B: 7.4 sec
C: 6.9 sec
D: 7.2 sec
Answer: A