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    Question

    A delivery van was going at 45 km/hr for ‘x’ hours and

    later sped up by 12 km/hr. It continued for (x + 3) hours more and covered 684 km during that time. What was the distance travelled at the beginning?
    A 252 km Correct Answer Incorrect Answer
    B 405 km Correct Answer Incorrect Answer
    C 370 km Correct Answer Incorrect Answer
    D 450 km Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    57 × (x + 3) = 684

    Or, x + 3 = 12

    Or, x = 9

    Therefore, required distance travelled = 45 × 9 = 405 km

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