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    Question

    Three cities A, B, and C are located such that they

    form the vertices of an equilateral triangle if joined by straight lines. Prasanna travels from A to B @ 50 km h. from B to C @ 75 km h and from C to A @ 90 km h. Find the average speed: of Prasanna for the entire journey.
    A 77.5 km/h Correct Answer Incorrect Answer
    B 72.5 km h Correct Answer Incorrect Answer
    C 62.5 km/h Correct Answer Incorrect Answer
    D 67.5 km h Correct Answer Incorrect Answer

    Solution

    The correct answer is D

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