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    Question

    A giant circular wheel has a diameter of 35 metres. In

    how many revolutions will the wheel cover a total of 16.5 km?
    A 150 Correct Answer Incorrect Answer
    B 100 Correct Answer Incorrect Answer
    C 140 Correct Answer Incorrect Answer
    D 110 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Radius of the giant wheel = 35 ÷ 2 = 17.5 metres Circumference of the giant wheel = 2 × π × radius = 2 × (22/7) × 17.5 = 110 metres So, number of rotations to cover 16.5 km i.e. 16500 metres = 16500 ÷ 110 = 150

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