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    Question

    Two boats A and B start towards each other from two

    places, 600 km apart. Speed of the boat A and B in still water are 23 km/h and 17 km/h respectively. If A and B proceeds against and with the stream, respectively then after how much time will they meet?
    A 20 hours Correct Answer Incorrect Answer
    B 15 hours Correct Answer Incorrect Answer
    C 12 hours Correct Answer Incorrect Answer
    D 13 hours Correct Answer Incorrect Answer
    E 17 hours Correct Answer Incorrect Answer

    Solution

    Let the speed of stream be ‘x’ km/h and they meet after‘t’ hours According to question, Distance covered while going upstream + Distance covered while going downstream = Total distance covered. (23 - x)t + (17 + x)t = 600 23t + 17t = 600 40t = 600 t = 15 hours

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