A train leaves London at 5 AM, and a train leaves Paris an hour later. If the two trains pass each other right in the middle of the journey, and the distance between London and Paris is 400 km, and the speed of the London train is 60 km/h, find the speed of the Paris train.
a)45 km/hr
b)56 km/hr
c)75 km/hr
d)86 km/hr
e)90 km/hr

• ans is 86km/hr
  total distance =400km/hr.
  London train speed is 60 km/hr then it takes 3.33 hr to croos the half distance (200/60)=3.33hr
  so how munch time time taken by paris train to croos the half distance starts 1 hr later so its crosses the half distance in 2.33 hrs distance of 200 mters
  then speed is s=(200/2.33)= 86km/hr.
• 9 years agoHelpfull: Yes(2) No(0)
• ans :a 45km/hr
  
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