Two trains are moving in opposite directions @ 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is:

A. 36 B. 45
C. 48 D. 49

• Ans: C
  Relative speed=60+90=150*5/18=(125/3)m/s
  Total Distance covered=(1.10+0.9)= 2 km = 2000m
  Required time = (2000*3/125) = 48sec
• 11 years agoHelpfull: Yes(5) No(0)
• total distance is 2 km and speed is 150 km/hr so time is 48sec
• 7 years agoHelpfull: Yes(1) No(1)