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    Question

    A wheel has a diameter of 28 meters and rotates at a

    speed of 25 revolutions per minute. How much distance will the wheel travel in 32 minutes?
    A 65.02 km Correct Answer Incorrect Answer
    B 70.4 km Correct Answer Incorrect Answer
    C 52.2 km Correct Answer Incorrect Answer
    D 32.66 km Correct Answer Incorrect Answer

    Solution

    ATQ, Radius of the wheel = (28/2) = 14 metres So, circumference of the wheel = 2 ├Ч ╧А ├Ч radius = 2 ├Ч (22/7) ├Ч 14 = 88 metres Distance covered by the wheel in one revolution = circumference of the wheel. So, distance covered by the wheel in one minute = 88 ├Ч 25 = 2200 metres (2200/1000)= 2.2 km So, distance covered by the wheel in 32 minutes = 2.2 ├Ч 32 = 70.4 km

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