The total interest paid can be calculated by:
[tex]P\times r\times t[/tex]Where P is the principal, r is the interest rate and t is the time in years.
For the first loan we have:
[tex]30000\times0.11\times\frac{20}{12}=5500[/tex]For the second loan we have:
[tex]30000\times0.1\times\frac{32}{12}=8000[/tex]Therefore the amount save is:
[tex]8000-5500=2500[/tex]Therefore none of the choices are correct.