a train running at the speed of 80km/hr leaves the railway station 6hrs after a goods train leaves and overtake in 4hrs then what is speed of good train?

• 32 km/hr
  
  If the speed of goods train=x km/hr
  In 6 hours( upto fast train starts) covers '6x' km.
  As the train running behind @ 80 km/hr overtakes the goods train in 4 hours, so the trains coverup the distance of 6x km with relative speed of '80-x' km/hr
  Hence 6x/(80-x)=4
  On solving x=32
• 8 years agoHelpfull: Yes(0) No(0)
• Train running at a speed of 80km/h and it takes 4hrs to over take the goods train.
  here total distance covered by train is 80*4=320km.
  the good train leaves the station before 6hrs of the normal train
  now
  the total time taken by the good train to travel 320km distance is 6+4=10hrs
  now speed of the goods train is=320km/10hrs= 32km/h
  
  
• 8 years agoHelpfull: Yes(0) No(0)