A train 360 m long runs with a speed of 45 km/hr. What time will it take to pass a platform of 140 m long?

Options
1) 38 sec
2) 35 sec
3) 44 sec
4) 40 sec

• train length= 360m
  platform length = 140m
  time= ?
  length = speed * time
  total length =360+140 = 500m
  speed = 45 km/hr =45 * (5/18) (m/sec) =12.5 m/sec
  time = length/speed = 500/12.5 = 40sec
• 9 years agoHelpfull: Yes(18) No(1)
• l=360 platform length=140
  t=?
  total length=360+140=500
  speed=45/5/8=12.5
  t=500/12.5=40sec
  
• 9 years agoHelpfull: Yes(2) No(0)
• time =distance /speed
  distance=train length+platform length=500m
  speed=45km/hr =45*5/18 m/sec
  time=500*18/(45*5)=4o sec
• 9 years agoHelpfull: Yes(1) No(0)
• length of train L1=360m, length of platform L2=140m,
  speed of train s=45km/hr.
  T=L1+L2/s(5*18)
  T=360+400/45(5*18)=40sec
• 9 years agoHelpfull: Yes(0) No(0)