7th Class Mathematics Mensuration Question Bank Mensuration (Perimeter & Area)

  • question_answer
    The circumference of a circle is 22 m. What is its area?

    A)  \[1018.5\text{ }{{m}^{2}}\]          

    B)  \[12.25\text{ }{{m}^{2}}\]      

    C)  \[38.5\text{ }{{m}^{2}}\]          

    D)  \[\text{40 }{{m}^{2}}\]

    Correct Answer: C

    Solution :

    (c): \[C=2\pi r=22\Rightarrow r=\frac{7}{2}\] \[A=\pi {{r}^{2}}=\pi \times {{\left( \frac{7}{2} \right)}^{2}}=38.5\]


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