8th Class Mathematics Mensuration Question Bank Mensuration

  • question_answer Find the surface area of a sphere of radius 7 cm.

    A)  616 \[c{{m}^{2}}\]    

    B)  516 \[c{{m}^{2}}\]        

    C)  590 \[c{{m}^{2}}\]                

    D)  450 \[c{{m}^{2}}\]

    Correct Answer: A

    Solution :

    (a): surface area \[=4\times \frac{22}{7}\times {{7}^{2}}\] \[=88\times 7=616.\]

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