Usaremos a fórmula do montante de juros compostos:
[tex]j=M-C \\
j=C(1-i)^n-C \\
C(1-i)^n-C=11000 \\
25000(1+i)^2-25000=11000 \\
\\
25000(1+i)^2=36000 \\
\\
(1+i)^2=\frac{36000}{25000} \\
\\
(1+i)^2=1,44 \\
\\
1+i=\sqrt{1,44} \\
\\
1+i=1,2 \\
\\
i=0,2 \\
\\
\boxed{i=20 \%}
[/tex]
