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

Question

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

owlfred · Answer

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anonymous · Answer

I forgot posting this line in this question. Through solution will be appreciated.

anonymous · Answer

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anonymous · Answer

I want to add this, the didn't helped and I want to find out the number of trips made by the bird in this process.

anonymous · Answer

i don't know that but i've heard it'll tend to infinity :)

anonymous · Answer

@brackett: Some strange intuition tells me that the number of trips will tend to infinity, but the total distance covered will tend to some finite value!

anonymous · Answer

The two trains approach each other at 30 + 30 = 60kmph. So they will collide in 60km/60kmph = 1hr. The bird will thus get 1hr to fly at 60kmph. Thus it will fly a total of 60km before the trains collide.