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    Question

    A bus was travelling at 55 km/hr. After ‘x’ hours, its

    speed increased by 12 km/hr and it continued for (x + 6) hours. If it covered 612 km in these (x + 6) hours, calculate the distance travelled in the first ‘x’ hours.
    A 190.15 km Correct Answer Incorrect Answer
    B 172.15 km Correct Answer Incorrect Answer
    C 128.15 km Correct Answer Incorrect Answer
    D 275.15 km Correct Answer Incorrect Answer

    Solution

    ATQ,

    67 × (x + 6) = 612

    Or, x + 6 = 9.13

    Or, x = 3.13

    Therefore, required distance travelled = 55 × 3.13 = 172.15 km

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