Question

If ${\log }_4\left(x+2y\right)+{\log }_4\left(x-2y\right)=1$, then maximum value of $\left|x\right|-\left|y\right|$ is-

• A. $\sqrt{2}$
• B. $\sqrt{3}$
• C. $\sqrt{5}$
• D. $9$

Answer 1

The correct option is A $\sqrt{2}$

$A=Rs.2200$
$P=Rs.2000$, $SI=2200-2000=Rs.200$
$R=\frac{SI\times 100}{P\times T}=\frac{200\times 100}{3\times 2000}=\frac{20}{6}=\frac{10}{3}$
$R=3.33$%