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    Question

    A person covers the first 288 km at a speed of 64 km/h,

    then travels the next 220 km at a speed of 40 km/h, and finally completes the remaining 288 km at a speed of 48 km/h. What is the average speed of the person for the entire journey?
    A 47.25 km/h Correct Answer Incorrect Answer
    B 47.75 km/h Correct Answer Incorrect Answer
    C 49.75 km/h Correct Answer Incorrect Answer
    D 49.25 km/h Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Total distance travelled = 288 + 220 + 288 = 796 km Total time taken = 288/64 + 220/40 + 288/48 = 4.5 + 5.5 + 6 = 16 hours Average speed = 796/16 = 49.75 km/h

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