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  1. A man walks at a speed of 3 km/hr and runs at a speed of 7 km/hr. How much time will the man require to cover a distance of 10 1/2 km, if he completes half of the distance, i.e., (5 1/4) km on foot and the other half by running?
    2. A.
    1 3/4 hrs
    B.
    2 1/4 hrs
    C.
    2 hrs
    D.
    3 1/2 hrs
    E.
    None of these

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    Answer : Option E

    Explanation :

    Required time = (5 1/4)/3 + (5 1/4)/7 = 2 1/2 hours.

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