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    Question

    A train covers a distance in 6 hours. If speed is

    increased by 10 km/h, time reduces by 30 minutes. Find original speed.
    A 110 km/h Correct Answer Incorrect Answer
    B 120 km/h Correct Answer Incorrect Answer
    C 145 km/h Correct Answer Incorrect Answer
    D 100 km/h Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let original speed = v Distance = 6v New time = 5.5 hours So 6v = (v + 10) × 5.5 6v = 5.5v + 55 0.5v = 55 v = 110 Answer: 110 km/h

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