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

  • question_answer \[\sqrt{0.9\times 0.09\times x}=0.9\times 0.09\times \sqrt{z}\]. Then the value of \[\frac{x}{z}\] is

    A)  0.081              

    B)  0.810          

    C)  0.081   

    D)  8.09

    Correct Answer: C

    Solution :

    (c): \[\sqrt{0.9\times 0.09\times x}=0.9\times 0.09\times \sqrt{z}\] \[\Rightarrow \frac{\sqrt{x}}{\sqrt{z}}\text{=}\frac{0.9\times 0.09}{\sqrt{0.9\times 0.09}}\] Squaring, \[\frac{x}{z}=\frac{{{\left( 0.9\times 0.09 \right)}^{2}}}{0.9\times 0.09}=0.9\times 0.09=0.081.\]          

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