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7th Class Mathematics Perimeter and Area Question Bank Perimeter and Area

  • question_answer
    The hour hand of a clock is \[4.5\text{ }cm\] long. What distance does its tip cover in 12 hours?

    A)  \[28\,m\]           

    B)         \[336\,cm\]

    C)  \[28.28\,cm\]                     

    D)         \[12\,cm\]

    Correct Answer: C

    Solution :

     The length of the hour hand \[=4.5\text{ }cm\] (=r). The distance it covers in 12 hours = The circumference of the circle with radius \[=4.5\text{ }cm\] \[=2\times \frac{22}{7}\times 4.5\,cm=28.28\,cm\]


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