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  1. By travelling at 40 kmph, a person reaches his destination on time. He covered two-third the total distance in one-third of the total time. What speed should he maintain for the remaining distance to reach his destination on time?
    2. A.
    20 kmph
    B.
    30 kmph
    C.
    25 kmph
    D.
    15 kmph
    E.
    None of these.

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    Answer : Option A

    Explanation :

    Let the time taken to reach the destination be 3x hours. Total distance = 40 * 3x = 120x km 

    He covered 2/3 * 120x = 80x km in 1/3 * 3x = x hours So, the remaining 40x km, he has to cover in 2x hours. Required speed = 40x/2x = 20 kmph.

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