A problem of trains

120m long train crosses the pole after 2 ½ sec. Find how much time it takes to cross the 140m long platform.

• train speed is =120/5/2=240/5=48m/s
  
  then to cross platform total distance is 120+140=260
  
  time taken to cross platform is=280/48=5.41666 sec
• 11 years agoHelpfull: Yes(17) No(10)
• @Mukesh can you elaborate your answer plz
  i.e train speed=120/5/2=120*2/5=240/5=48m/s
  to cross platform total dist. is = length of train + platform= 120+140=260
  time taken to cross platform is = 260/48=5.4166.
• 11 years agoHelpfull: Yes(7) No(1)
• speed of the train is s=120/(5/2) which is 48,the time taken to cover platform is (120+140)/48=5.41666
  
• 11 years agoHelpfull: Yes(3) No(0)
• 120 meters is crossed by 2.5 sec
  so speed = 120/2.5= 48 m per sec
  time taken to travel 140 m =140/48 =2.9
• 11 years agoHelpfull: Yes(0) No(7)
• 14
  120+140/x=5/2
  520=5x
  x=14
• 9 years agoHelpfull: Yes(0) No(0)
• 5.42 sec thanks
• 9 years agoHelpfull: Yes(0) No(0)
• velocity of train is 120/2.5 mps..=48 mps
  then to cross 140 m it take 140/48......2.916 s...
• 9 years agoHelpfull: Yes(0) No(0)