8th Class Mathematics Mensuration Question Bank Mensuration

  • question_answer The diameter of a cone is 14 cm and its slant height is 9 cm. Find the area of its curved surface

    A)  128 \[c{{m}^{2}}\]                

    B)  110 \[c{{m}^{2}}\]        

    C)  198 \[c{{m}^{2}}\]

    D)  200 \[c{{m}^{2}}\]

    Correct Answer: C

    Solution :

    (c): Curved surface area \[=\pi rl\] \[\frac{22}{7}\times 7\times 9\] = 198. 


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