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    Question

    A cyclist travels from point A to point B at a speed of

    12 km/h and returns at a speed of 15 km/h. Calculate the average speed for the entire trip if the distance between A and B is 30 km.
    A 13 km/h Correct Answer Incorrect Answer
    B 12 km/h Correct Answer Incorrect Answer
    C 14 km/h Correct Answer Incorrect Answer
    D 13.33 km/h Correct Answer Incorrect Answer

    Solution

    Time taken to travel from A to B = 30 / 12 = 2.5 hours. Time taken to return from B to A = 30 / 15 = 2 hours. Total distance = 30 + 30 = 60 km. Total time = 2.5 + 2 = 4.5 hours. Average speed = Total distance / Total time = 60 / 4.5 = 13.33 km/h (approx). Correct answer: D) 13.33 km/h

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