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    Question

    A giant circular wheel has a diameter of 28 metres. In

    how many revolutions will the wheel cover a total of 11 km?
    A 120 Correct Answer Incorrect Answer
    B 135 Correct Answer Incorrect Answer
    C 125 Correct Answer Incorrect Answer
    D 145 Correct Answer Incorrect Answer

    Solution

    Radius of the giant wheel = 28 ÷ 2 = 14 metres Circumference of the giant wheel = 2 × π × radius = 2 × (22/7) × 14 = 88 metres So, number of rotations to cover 11 km i.e. 11000 metres = 11000 ÷ 88 = 125

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