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    Question

    A train passed two bridges of lengths 800 m and

    400 m in 100 seconds and 60 seconds respectively. The length of the train is?
    A 80 m Correct Answer Incorrect Answer
    B 90 m Correct Answer Incorrect Answer
    C 200 m Correct Answer Incorrect Answer
    D 150 m Correct Answer Incorrect Answer

    Solution

    Let the length of the train be x. According to the question, x + 800/ 100 = x + 400 / 60 60x + 48000 = 100x + 40000 48000 - 40000 = 100x - 60x 8000 = 40x x = 200 m Let the length of the train be According to the question, + 800/ 100 = + 400 / 60 60 + 48000 = 100 + 40000 48000 - 40000 = 100 - 60 8000 = 40 = 200 m

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