Sonika invested an amount of Rs.5800 for 2 years. At what rate of compound interest will she get an amount of Rs.594.50 at the end of 2 years ?

C.I =  $P1+\frac{r}{100}t-1$

594.5 =  $58001+\frac{r}{100}2-1$

  $\frac{594.5}{5800}+1=1+\frac{r}{100}2$

$\frac{r}{100}=1.05-1=0.05=> r = 5$ % .