• # question_answer 5) $\sqrt{0.9\times 0.09\times x}=0.9\times 0.09\times \sqrt{z}$. Then the value of $\frac{x}{z}$ is A)  0.081              B)  0.810          C)  0.081   D)  8.09

(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, $\frac{x}{z}=\frac{{{\left( 0.9\times 0.09 \right)}^{2}}}{0.9\times 0.09}=0.9\times 0.09=0.081.$