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    Question

    A girl walks to her college at (5/6) of her normal speed

    and reaches 25 minutes late. Find how long she normally takes to reach college.
    A 125 mins Correct Answer Incorrect Answer
    B 180 mins Correct Answer Incorrect Answer
    C 144 mins Correct Answer Incorrect Answer
    D 175 mins Correct Answer Incorrect Answer

    Solution

    ATQ, When distance is constant, Time ∝ (1 / Speed) Ratio of usual time to new time = 5 : 6 Let usual time = 5t and new time = 6t. 6t – 5t = 25 ⇒ t = 25 Usual time = 5t = 5 × 25 = 125 minutes

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