A train travelling 80kmph to pass through a tunnel of 70km at 5:12am. the train leaves the tunnel at 5:18am. find the length of train?

• wrong question not 70km its 7km
  Distance=speed*time
  let x is length of train
  5:18-5:12=6minutes=6/60 hr=1/10hr
  now D=(x+7)=80kmph*1/10
  x=1km
• 9 years agoHelpfull: Yes(28) No(1)
• tunnel length =7 Km
  let Train length = x km
  distance = 80km
  time= 5:18-5:12= 6 min or 6/60 hr.
  Using formula
  Time taken by train= train length+ tunnel length/distance
  6/60= (x+7)/80
  solving this we get
  x=1Km
• 9 years agoHelpfull: Yes(5) No(1)
• is it a tunnel or a blackhole? :O
  
  it must be 7km :P
• 8 years agoHelpfull: Yes(1) No(1)
• lol if the tunnel is 70 km then the train length will be 62 km
  70+t=80x6/60
• 8 years agoHelpfull: Yes(1) No(1)
• total distance the has to travel is=length of train+length of tunnel=
  consider length of train is x km.
  so,total distance=x+75
  time taken by train to come out from tunnel=6 min
  80=(x+70)/6/60
  x=62km
  
• 8 years agoHelpfull: Yes(1) No(0)