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

  • question_answer
    The difference between the circumference and radius of a circle is\[37\text{ }m\]. What is the circumference of the circle?

    A)  \[7\,m\]             

    B)         \[44\,m\]  

    C)  \[154\,m\]        

    D)         \[88\,m\]          

    Correct Answer: B

    Solution :

     \[2\pi r-r=37\] \[r=\frac{37}{2\pi -1}=\frac{37}{2\times \frac{22}{7}-1}=7\,m\] Circumference\[=2\pi r=2\times \frac{22}{7}\times 7=44\,m\]


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