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  1. A fast train takes 3 hours less than the slow train for a journey of 600km. IF the speed of the slow train is 10km/hr less than the fast train the speed of the slow train is
    2. A.
    30km/hr
    B.
    35km/hr
    C.
    40km/hr
    D.
    45km/hr

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    Answer : Option C

    Explanation :

    let the speed of the train be x km/hr and (x + 10)km/hr, then  


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