Question

    A giant circular wheel has a diameter of 49 metres. In

    how many revolutions will the wheel cover a total of 30.8 km?
    A 210 Correct Answer Incorrect Answer
    B 220 Correct Answer Incorrect Answer
    C 230 Correct Answer Incorrect Answer
    D 200 Correct Answer Incorrect Answer

    Solution

    Radius of the giant wheel = 49 ÷ 2 = 24.5 metres Circumference of the giant wheel = 2 × π × radius = 2 × (22/7) × 24.5 = 154 metres So, number of rotations to cover 30.8 km i.e. 30800 metres = 30800 ÷ 154 = 200

    Practice Next

    Relevant for Exams: