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Discussion :: Problems on Trains

  1. Two stations A and B are 110 km apart on a straight line. One train starts from A at 7 a.m. and travels towards B at 20 kmph. Another train starts from B at 8 a.m. and travels towards A at a speed of 25 kmph. At what time will they meet?
    2. A.
    9 a.m.
    B.
    10 a.m.
    C.
    10.30 a.m.
    D.
    11 a.m.

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    Answer : Option B

    Explanation :

    Suppose they meet x hours after 7 a.m. 

    Distance covered by A in x hours = 20x km. 

    Distance covered by B in (x - 1) hours = 25(x - 1) km. 

    Therefore 20x + 25(x - 1) = 110 

    45x = 135  

    x = 3. 

    So, they meet at 10 a.m.

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