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    Question

    If a wheel covers a distance of 660 m in 30 rotations,

    then the diameter of the wheel is?
    A 3.5 m Correct Answer Incorrect Answer
    B 14 m Correct Answer Incorrect Answer
    C 7 m Correct Answer Incorrect Answer
    D 21 m Correct Answer Incorrect Answer

    Solution

    Distance covered in 30 rotations = 660 m Distance covered in 1 rotations = 660/30 = 22 m ∴ Distance covered in 1 rotation = circumference of the wheel 2πr = 22m 2r (diameter) = (22 × 7)/22 = 7 m

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