8th Class Mathematics Squares and Square Roots Question Bank Square and Square Roots

  • question_answer 18) If \[\sqrt{\mathbf{4096}}=\mathbf{64},\] then find the value of \[\sqrt{4096}+\sqrt{40.96}+\sqrt{0.004096}\]

    A)  70.646            

    B)  60.464          

    C)  70.464 

    D)  40.646

    Correct Answer: C

    Solution :

    (c): Value \[64+\sqrt{4096\times 10{{~}^{-2}}}+\sqrt{4096\times {{10}^{-6}}}\] \[=64+64\times {{10}^{-1}}+64\times {{10}^{-3}}\] \[=64+6.4+0.64\] \[=\,\,70.464\]               

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