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    Question

    A giant circular wheel has a diameter of 35 metres. In

    how many revolutions will the wheel cover a total of 16.5 km?
    A 150 Correct Answer Incorrect Answer
    B 100 Correct Answer Incorrect Answer
    C 140 Correct Answer Incorrect Answer
    D 110 Correct Answer Incorrect Answer

    Solution

    Radius of the giant wheel = 35 ├╖ 2 = 17.5 metres Circumference of the giant wheel = 2 ├Ч ╧А ├Ч radius = 2 ├Ч (22/7) ├Ч 17.5 = 110 metres So, number of rotations to cover 16.5 km i.e. 16500 metres = 16500 ├╖ 110 = 150

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