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    Question

    A giant circular wheel has a diameter of 56 metres. In

    how many revolutions will the wheel cover a total of 52.8 km?
    A 310 Correct Answer Incorrect Answer
    B 330 Correct Answer Incorrect Answer
    C 340 Correct Answer Incorrect Answer
    D 300 Correct Answer Incorrect Answer

    Solution

    Radius of the giant wheel = 56 ÷ 2 = 28 metres Circumference of the giant wheel = 2 × π × radius = 2 × (22/7) × 28 = 176 metres So, number of rotations to cover 52.8 km i.e. 52800 metres = 52800 ÷ 176 = 300

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