Q. Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is:

Option
A. 9
B. 9.6
C. 10
D. 10.8

• Option D 10.8
  Relative speed of the trains=60+40=100km/hr=100*5/18 m/s=250/9
  Time taken to cross each other=total distance/speed
  300/250/9=54/5=10.8sec
• 12 years agoHelpfull: Yes(4) No(0)