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One train leaves Los Angeles at 15mph heading for New York. Another train leaves from New York at 20mph heading for Los Angeles on the same track. If a bird, flying at 25mph, leaves from Los Angeles at the same time as the train and flies back and forth between the two trains until they collide, how far will the bird have traveled?

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One train leaves Los Angeles at 15mph heading for New York. Another train leaves from New York at 20mph heading for Los Angeles on the same track. If a bird, flying at 25mph, leaves from Los Angeles at the same time as the train and flies back and forth between the two trains until they collide, how far will the bird have traveled?
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2 Answers

  1. insufficient information distance between LA and NY is not
    given it should be given to find the no solution

  2. Solution
    Apply approximation.
    Find the time (t hours) taken for both trains to meet:
    15t + 20t = 5000
    35t = 5000
    35t / 35 = 5000 / 35
    t = 1000/7
    Find the approximated distance flied by the bird:
    25 * (1000/7) = 25000/7
    The distance is 25000/7 miles