Question

    A giant circular wheel has a diameter of 28 metres. In how many revolutions will the wheel cover a total of 26.4 km?

    A 310 Correct Answer Incorrect Answer
    B 320 Correct Answer Incorrect Answer
    C 300 Correct Answer Incorrect Answer
    D 330 Correct Answer Incorrect Answer
    E None of these 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 16.5 km i.e. 16500 metres = 26400 ÷ 88 = 300

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