trains a and b are travelling on the same route..heading towards the same direction.train b has already covered a distance of 220 kmbefore the train a started.the two trains met each other after 11 houra after the starting of train a. had the train travelling towards each other from a distance of 220 km then they would have met after 1 hour.now what is the speed of train a and b?

• 120 and 100km/hr
  
  Let x be the speed of a and y speed of b
  
  When both trains travel towards each other
  speed = x+y
  
  given distance = 220
  time taken = 1hour
  speed = distance/time
  x+y = 220/1
  x+y = 220 ----(1)
  
  Let d be the additional distance travelled by the trains
  ie total distance travelled by the trains is
  distance = 220+d
  
  time taken by a = 11 hours
  speed = (220+d)/11
  x = (220+d)/11---(2)
  
  Time taken by b to cover the distance d is
  time = 11
  so,
  Speed = d/11
  y = d/11---(3)
  
  Substitute value of y in eqn(2)
  x = 20+y
  x - y = 20----(4)
  
  Solving (1) and (4)
  x = 120km/hr
  and
  y = 100km/hr
  
  
• 10 years agoHelpfull: Yes(1) No(0)