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    Question

    Due to walking at (3/4) of his normal speed, a boy reaches

    school 18 minutes late. What is the time he normally takes to go to school?
    A 12 mins Correct Answer Incorrect Answer
    B 54 mins Correct Answer Incorrect Answer
    C 45 mins Correct Answer Incorrect Answer
    D 32 mins Correct Answer Incorrect Answer

    Solution

    ATQ,

    When distance is constant,

    Time тИЭ (1/Speed)

    So, time ratio = 3:4

    Let usual time = 3t and new time = 4t

    4t тАУ 3t = 18

    t = 18

    Usual time = 3t = 3 ├Ч 18 = 54 minutes

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