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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 it flies directly back to the first train, and so forth. What is the total distance the bird travels?

I am assuming that the bird travels till the two trains meet in the middle since their velocity is the same. But I am not sure how to approach the question. Thank you so much in advance for the help.