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    Question

    A car travels 90 km at a speed of 45 km/hr, then 120 km

    at 60 km/hr and finally 210 km at 70 km/hr. What is the average speed for the entire journey?
    A 58.1 km/hr Correct Answer Incorrect Answer
    B 61.3 km/hr Correct Answer Incorrect Answer
    C 48 km/hr Correct Answer Incorrect Answer
    D 60 km /hr Correct Answer Incorrect Answer

    Solution

    The correct answer is D

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