8th Class Mathematics Mensuration Question Bank Mensuration

  • question_answer A rectangular piece of paper is 71 cm long and 10 cm wide. A cylinder is formed by rolling the paper along its breadth. Find the volume of the cylinder.

    A)  654                             

    B)  764            

    C)  500                             

    D)  564.78

    Correct Answer: D

    Solution :

    (d): \[2\pi R=10=R=\frac{10}{2\pi }\] \[V=\pi {{R}^{2}}h=\pi \times \frac{100}{4{{\pi }^{2}}}\times 71\] \[=\frac{100}{4\times \frac{22}{7}}\times 71=\frac{7100\times 7}{88}=564.78\]


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