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    Question

    A car traveling at a speed of 60 km/h covers a certain

    distance in 6 hours. If the car increases its speed by 20%, how much time will it save for the same distance?
    A 1 hour Correct Answer Incorrect Answer
    B 1.2 hours Correct Answer Incorrect Answer
    C 1.5 hours Correct Answer Incorrect Answer
    D 1.8 hours Correct Answer Incorrect Answer

    Solution

    Distance = Speed Ă— Time = 60 Ă— 6 = 360 km New speed = 60 + 20% of 60 = 60 + 12 = 72 km/h New time = Distance / New speed = 360 / 72 = 5 hours Time saved = 6 - 5 = 1 hour

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