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    Question

    A man first travels 140 km at 70 km/hr and next 140 km

    at 35 km/hr. The average speed for the first 280 km of his travelling is:
    A 46.66 km/hr Correct Answer Incorrect Answer
    B 37.5 km/hr Correct Answer Incorrect Answer
    C 42.33 km/hr Correct Answer Incorrect Answer
    D 35.35 km/hr Correct Answer Incorrect Answer

    Solution

    Total time taken = [(140/70) + (140/35)] hrs = 6 hrs Average speed = 280/6 km/hr = 46.66 km/hr

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