Two trains st art from Chennai and villupuram spaced 150 k m apart at the same time
and speed as the tr ains start, a bird flies fro m one train towards the other and on
reac hing the s econd t rain; it flies back to the first tr ain. T his is repeated till the trains
c ollide. If the speed of the trains is 75 kmph and that of the bird is 100 k mph. How much
did the bird travel till collision?

• relative velocity of trains (100+50)kmph
  time require to travel 150km=150/150 = 1 hr.
  distance travel by the bird in this 1 hr. = 100*1= 100 km
• 11 years agoHelpfull: Yes(16) No(0)
• when both the train collide they have travel the total distance of 150 km togrther.
  
  75t+75t=150
  t=1 hr.
  
  the two train collide after 1 hr of their start.
  speed of bird is 100kmph. so in 1 hr bird has travel 100km.
• 11 years agoHelpfull: Yes(3) No(0)
• he gave trains speed as 75
  time taken by them to collide is 75t=150-75t;
  t=1 hr
  bird travels in this one hour only
  so bird travels 100*1=100 km
  
• 11 years agoHelpfull: Yes(2) No(0)
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