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SSC Sample Paper Mock Test-4 SSC CGL Tear-II Paper-1

  • question_answer
               The base of a conical tent is 19.2 m in diameter and the height of its vertex is 2.8 m. The area of the canvas required to put up such a tent (in sq m) nearly (taking \[\pi =\frac{22}{7}\])                    

    A)  3017.1            

    B)  3170

    C)  301.7

    D)  30.17

    Correct Answer: C

    Solution :

    Height (h) = 2.8 m Slant height \[l=\sqrt{{{r}^{2}}+{{h}^{2}}}\] \[=\sqrt{{{(9.6)}^{2}}+{{(2.8)}^{2}}}\] \[=\sqrt{92.16+7.84}\] \[=\sqrt{100}=10\,\,\text{m}\] \[\therefore \]Required area = Curved surface area \[=\pi rl\]                         \[=\frac{22}{7}\times 9.6\times 10\]sq m = 30.17 sq m                


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