How long will a train 100 m long travelling at speed 72kmph overtake another train which is 200m long travelling at 54kmph?

• total speed=72-54=18 km/h=18*5/18=5 m/sec
  total length=200+100=300 m
  time=300/5=60 sec
  so train will overtake another train in 1 minute(ans)
• 12 years agoHelpfull: Yes(74) No(0)
• The length of two trains are 100m, 200m and the speed are 20m/sec,15m/sec respectively..........the train overtake in 100+200/20-15 sec. (ie) 60 sec or 1min
• 12 years agoHelpfull: Yes(12) No(1)
• 72 kmph=72*5/18 mps=20mps.
  54 kmph=54*5/18 mps=15 mps.
  The train has to travel (200+100)m=300m to overtake the other one.
  Resultant velocity=(20-15)mps=5 mps
  time it takes to travel 300m at a velocity of 5 mps is 60 sec..
  Ans 60 sec..
• 12 years agoHelpfull: Yes(6) No(0)
• relatively speed=72-54=18kmph
  total distance covered by fast train=100+200=300
  time=300/(18*(5/18))=60 sec.
• 12 years agoHelpfull: Yes(5) No(0)
• relative speed =72-54=18
  tot l=100+200
  time=300/(18*5/18)=60s
• 12 years agoHelpfull: Yes(4) No(0)
• 72 kmph=72*5/18 mps=20mps.
  54 kmph=54*5/18 mps=15 mps.
  The train has to travel (200+100)m=300m to overtake the other one.
  Resultant velocity=(20-15)mps=5 mps
  time it takes to travel 300m at a velocity of 5 mps is 60 sec..
  Ans 60 sec..
• 12 years agoHelpfull: Yes(3) No(1)
• time=dist/speed
  two trains travelling in same direction,so find relative speed
  speed=72-54=18km/hr=18*(5/18)=5mt/s
  dist=100+200=300
  so time=300/5=>60sec (i.e)1min
• 11 years agoHelpfull: Yes(2) No(0)
• Total length of train(L) => {100(L1)+200(L2)} m => 300 m
  Relative Speed Of Train(V) => 72(V1)-54(V2) => 18 kmph => 5m/s
  Total tiime taken to cross the train => Total length of train(L)/Relative Speed Of Train(V)
  => 300/5 sec
  => 60 sec.
• 11 years agoHelpfull: Yes(1) No(0)
• if train of one length a metres nd b metres are moving in same direction at u m/s nd v m/s,.....then time taken by faster train to cross slower train is
  a+b/u-v.....by applying thzz formula for above question u can get easilyyyyyyy...
• 10 years agoHelpfull: Yes(0) No(0)
• speed=72-54=18kmph
  total length=100+200=300m
  time=300m/18*5/18=60sec=1min
• 9 years agoHelpfull: Yes(0) No(0)