Question

    The circumference of a wheel is 39.6 cm. What is the

    radius of the wheel?
    A 6.3 cm Correct Answer Incorrect Answer
    B 4.2 cm Correct Answer Incorrect Answer
    C 5.2 cm Correct Answer Incorrect Answer
    D 7.2 cm Correct Answer Incorrect Answer

    Solution

    ATQ,

    We know the formula for circumference of a circle is 2 × π × r, where 'r' is the radius Let the radius of the wheel be 'r' cm ATQ: 2 × (22/7) × r = 39.6 Or, 44r = 39.6 × 7 Or, r = (39.6 × 7) ÷ 44 Or, r = 6.3 Therefore, radius of the wheel = 6.3 cm

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