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neoh147 Group Title

Two trains, each having a speed of 30 km/h, are headed at each other on the same straight track. A bird that can fly 60 km/h flies off the front of one train when they are 60 km apart and heads directly for the other train. On reaching the other train, the bird flies directly back to the first train, and so forth. What is the total distance the bird travels before the trains collide?

  • 2 years ago
  • 2 years ago

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  1. neoh147 Group Title
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    i know the answer is 60km.. but how to show??

    • 2 years ago
  2. A.Avinash_Goutham Group Title
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    so the bird start flying wen they are 60 km apart..

    • 2 years ago
  3. neoh147 Group Title
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    ya

    • 2 years ago
  4. A.Avinash_Goutham Group Title
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    ok let's do it the smart way.......if u r sitting on the first train and u see the second train........wat wud be it's speed? like rate f approach r wateva

    • 2 years ago
  5. neoh147 Group Title
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    relative speed.. if i'm in train A, i will see train B moving with 60km/h toward me...

    • 2 years ago
  6. A.Avinash_Goutham Group Title
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    yea nd that bird?

    • 2 years ago
  7. neoh147 Group Title
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    moving with 30km/h away frm me

    • 2 years ago
  8. A.Avinash_Goutham Group Title
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    yea.....so u got a train 60 km away nd moving towards u @ 60 kmph and a damn bird moving away @ 30kmph........so u wanna find wen that bird reaches the train

    • 2 years ago
  9. neoh147 Group Title
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    half hour..meet at 30km position..

    • 2 years ago
  10. neoh147 Group Title
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    i think i get the idea ald.. thx a lot A.Avinash... just using the relative speed of both train n bird toward me.. n i look like resting.. thn i use the total time for calc the actual distance of the bird...

    • 2 years ago
  11. A.Avinash_Goutham Group Title
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    well ok then

    • 2 years ago
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