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    Question

    A bus travels 200 miles at a constant speed of 50 miles

    per hour. It then makes a 30-minute stop before continuing its journey at a constant speed of 60 miles per hour for another 150 miles. What is the average speed of the bus for the entire journey?
    A 50 mph Correct Answer Incorrect Answer
    B 57.5 mph Correct Answer Incorrect Answer
    C 60 mph Correct Answer Incorrect Answer
    D 62.5 mph Correct Answer Incorrect Answer

    Solution

    ATQ, Total distance = 200 + 150 = 350 miles Time taken for the first 200 miles = 200/50 = 4 hours Time taken for the last 150 miles = 150/60 = 2.5 hours Total time = 4 + 0.5 (for the stop) + 2.5 = 7 hours Average speed = 350/7 = 50 mph

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