how long will train 100m long travel at 72k/hrtake to overtake another train 200 m long travelk at 54k/hr

• edit:
  relative speed between two trains is (72-54)=18k/hr
  time=(distance/relative speed)
  distance= 100+200 = 300m= 0.3 km
  ans= time= 0.3/18=0.01666 hr= 60 seconds
• 11 years agoHelpfull: Yes(10) No(0)
• Ans=60 Sec.
  Relative speed=72-54=18 km/hr, distance to be traveled=100+200=300 m.
  Time taken to overtake=300*3600/18000=60 sec.
  
• 11 years agoHelpfull: Yes(2) No(1)
• 60 seconds is the answer
  relative speed=72-54=18 km/hr,total distance=100+200=300 m
  convert 18 km/hr into m/sec so, 5 m/sec
  rel speed=dis/time
  5=300/t
  t=60 sec
• 11 years agoHelpfull: Yes(2) No(1)
• relative speed between the two trains is (72-54)=18k/hr
  18km/hr=18*(5/18)m/sec=>5m/sec
  distance= 100+200 = 300m
  ans= time= 300/5 60 seconds
• 11 years agoHelpfull: Yes(2) No(1)
• time=distance/speed
  opposite direction so 72-54=18kmphr
  18*(5/18)=5m/sec
  total distance=100+200=300m
  time=300/5=60sec
  
• 11 years agoHelpfull: Yes(1) No(0)
• relative speed between two trains is (72-54)=18k/hr
  time=(distance/relative speed)
  distance= 100+200 = 300m= 0.3 km
  ans= time= 0.3/18=0.01666 hr= 60 seconds
• 11 years agoHelpfull: Yes(1) No(0)
• relative speed between two trains is (72-54)=8k/hr
  time=(distance/relative speed)
  distance= 100+200 = 300m= 0.3 km
  ans= time= 0.3/8=0.0375 hr= 135 seconds
  
• 11 years agoHelpfull: Yes(0) No(5)
• 18000 meter 60 min
  300 meter x
  
  x=1min
• 11 years agoHelpfull: Yes(0) No(1)