A man sitting in a train which is traveling at 50 kmph observes that a goods train, traveling in opposite direction, takes 9 seconds to pass him. If the goods train is 150 m long, find its speed.

• speed of train = 50 kmph = 50*5/18 = 250/18 m/sec
  relative speed =(250/18)+x where x is speed of goods train
  then
  150/((250/18)+x) = 9
  solving it, we get
  x= 50/18 m/sec = 10 km/hr
• 12 years agoHelpfull: Yes(3) No(20)
• relative speed=280/9=112kmph.
  speed of goods train =112-50=62kph
• 5 years agoHelpfull: Yes(0) No(0)