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    Question

    A car travels 120 km at a speed of 40 km/h and returns

    at a speed of 60 km/h. Find the average speed of the car for the whole journey.
    A 48 km/h Correct Answer Incorrect Answer
    B 50 km/h Correct Answer Incorrect Answer
    C 52 km/h Correct Answer Incorrect Answer
    D 55 km/h Correct Answer Incorrect Answer

    Solution

    Average speed = (2 * speed1 * speed2) / (speed1 + speed2). Substituting the given values, Average speed = (2 * 40 * 60) / (40 + 60) = 48 km/h. Correct answer: a) 48 km/h

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