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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 4.4 km?
    A 110 Correct Answer Incorrect Answer
    B 120 Correct Answer Incorrect Answer
    C 130 Correct Answer Incorrect Answer
    D 100 Correct Answer Incorrect Answer

    Solution

    Radius of the giant wheel = 14 ├╖ 2 = 7 metres Circumference of the giant wheel = 2 ├Ч ╧А ├Ч radius = 2 ├Ч (22/7) ├Ч 7 = 44 metres So, number of rotations to cover 4.4 km i.e. 4400 metres = 4400 ├╖ 44 = 100

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