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

  • question_answer
    The diameter of a wheel of a cycle is\[70\text{ }cm\]. It moves slowly along a road. What distance will it cover in 24 complete revolutions?  

    A)  5820cm               

    B)         5280cm        

    C)  5028cm               

    D)         5082cm      

    Correct Answer: B

    Solution :

     Radius of a wheel \[=\frac{70}{2}=35\,cm\] In one revolution, the wheel covers a distance equal to its circumference                 \[\therefore \]  \[2\pi r=2\times \frac{22}{7}\times 35=220\,cm\] In 24 complete revolutions, distance covered \[=24\times 220=5280\,cm\]


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