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    Question

    If a circular wheel covers a distance of 9240 metres in 105

    revolutions, find the diameter of the wheel. (Use π = 22/7)
    A 30 m Correct Answer Incorrect Answer
    B 28 m Correct Answer Incorrect Answer
    C 17 m Correct Answer Incorrect Answer
    D 36 m Correct Answer Incorrect Answer

    Solution

    ATQ,

    Distance = 9240 metres

    Circumference = 9240 ÷ 105 = 88 metres

    Let radius be x metres

    Circumference = 2πr

    ATQ:

    88 = 2 × (22/7) × x

    x = 14

    Diameter = 2 × 14 = 28 metres

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