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NTSE Sample Paper NTSE SAT Practice Test-7

  • question_answer
    The length of a cuboid is 16 cm. Its breadth and height are 14 cm and 7 cm respectively The ratio of its surface area and the volume  (numerically) is                   

    A) 31 :46                          

    B) 43 :56      

    C) 31:56               

    D) none of these

    Correct Answer: C

    Solution :

    [c] Surface area \[=2\text{ }\left[ 16\times 14+14\times 7+16\times 7 \right]\text{ }c{{m}^{2}}=868\text{ }c{{m}^{2}}\] Volume \[=\left( 16\times 14\times 7 \right)\text{ }c{{m}^{3}}=1568\text{ }c{{m}^{3}}\] \[\therefore \] Numerical ratio of surface area and volume is 868 : 1568 or 31 : 56


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