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    Question

    In a 20 km race, A, B, and C are running at constant

    speeds. If A finishes the race 4 km ahead of B, and B finishes 4 km ahead of C, by how many meters does A beat C?
    A 8.4 km Correct Answer Incorrect Answer
    B 7.2 km Correct Answer Incorrect Answer
    C 5.8 km Correct Answer Incorrect Answer
    D 6.6 km Correct Answer Incorrect Answer

    Solution

    When ‘A’ covers 20 km, ‘B’ will cover 16 km Similarly, when ‘B’ covers 20 km, ‘C’ covers 16 km Therefore, when ‘B’ covers 16 km, then ‘C’ will cover = (16 × 16)/20 = 12.8 km Therefore, ‘A’ will beat ‘C’ by = 20 – 12.8 = 7.2 km

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