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    Question

    A girl walking at a speed of 9 km/h crosses a bridge in

    45 minutes. Find the length of the bridge in metres..
    A 6349 Correct Answer Incorrect Answer
    B 6398 Correct Answer Incorrect Answer
    C 6750 Correct Answer Incorrect Answer
    D 7532 Correct Answer Incorrect Answer

    Solution

    Time = 45 minutes = 45/60 hours = 0.75 hours Speed = 9 km/h Distance = Speed × Time ⇒ Distance = 9 km/h × 0.75 hours ⇒ Distance = 6.75 km ⇒ Distance in metres = 6.75 km × 1000 ⇒ Distance = 6750 metres

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