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7th Class Mathematics Mensuration Question Bank Mensuration

  • question_answer
    The difference between circumference and radius of a circle is 37 m. The circumference of that circle is

    A) 7 m                             

    B) 44 m

    C) 154 m                         

    D) None of these

    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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