How long will a train 100 m long and travelling at a speed of 45 kmph,take to corss a platform of length 150 m?
a)20 sec b)29 sec c)27 sec d)cannot be determined

• Ans a 20 sec
  Given speed is to be converted into m/sec 45×5/18=12.5
  Time taken t=l1+l2/s
  So (100+120)/12.5=20 sec
• 9 years agoHelpfull: Yes(0) No(0)
• ans 20sec
  speed =45*5/18 = 25/2 m/sec
  time= (100+150)/25/2
  time=250*2/25
  time =20sec
• 9 years agoHelpfull: Yes(0) No(0)