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    Question

    A giant circular wheel has a diameter of 14 metres. In

    how many revolutions will the wheel cover a total of 16.5 km?
    A 370 Correct Answer Incorrect Answer
    B 365 Correct Answer Incorrect Answer
    C 345 Correct Answer Incorrect Answer
    D 375 Correct Answer Incorrect Answer

    Solution

    Radius of the giant wheel = 14 ÷ 2 = 7 metres Circumference of the giant wheel = 2 × π × radius = 2 × (22/7) × 7 = 44 metres So, number of rotations to cover 16.5 km i.e. 16500 metres = 16500 ÷ 44 = 375

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