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    Question

    Amit drove for 6 hours at a speed of 60 miles per hour

    and for 6 hours at 50 miles per hour. What was his average speed (in miles per hour) for the whole journey?
    A 45km/h Correct Answer Incorrect Answer
    B 55km/h Correct Answer Incorrect Answer
    C 50km/h Correct Answer Incorrect Answer
    D 35km/h Correct Answer Incorrect Answer

    Solution

    Distances- =60 mph × 6 hrs. = 360 miles =50 mph 6 hrs. = 300 miles Total distance =360 miles + 300 miles = 660 miles Total time = 6 hrs. + 6 hrs. = 12 hrs. Average speed =660 miles /12 hrs. =55 mph

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