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    Question

    The distance between two stations A and B is 900 km. A

    train starts from A and moves towards B at an average speed of 30 km/hr. Another train starts from B, 20 minutes earlier than the train at A, and moves towards A at an average speed of 40 km/hr. How far from A will the two trains meet ?
    A 390 km Correct Answer Incorrect Answer
    B 365 km Correct Answer Incorrect Answer
    C 372 km Correct Answer Incorrect Answer
    D 380 km Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Distance covered by 2nd train in 20 minutes = (20/60) ├Ч 40 = 40/3 km Remaining distance = 900 тАУ (40/3) = 2660/3km Time after which they will meet = [(2660/3)/70] hours Distance covered from A in this time = (2660/210) ├Ч 30 = 380 km

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