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Railways Sample Paper RRB (Group D) Sample Test Paper-15

  • question_answer
    A rectangular piece of paper of dimensions 22 cm by 12 cm is rolled along its length to form a cylinder. The volume (in \[c{{m}^{3}}\]) of the cylinder so formed is \[(use\,\pi =\frac{22}{7})\]

    A)  562                 

    B)  412

    C)  462     

    D)  362

    Correct Answer: C

    Solution :

    [c] \[2\pi r=22\,\,cm\] \[r=\frac{22\times 7}{2\times 22}=\frac{7}{2}\,\,cm\] Height, h =12 cm Volume of cylinder\[=\frac{22}{7}\times \frac{7}{2}\times \frac{7}{2}\times 12=462\,\,c{{m}^{3}}\]


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