Mr sayyad kept rupees 40000 in a bank and 8% compound interest for 2 years MR Fernandez invested rupees 120000 in a mutual fund for two years after two years Mr Fernandez got 192000 whose investment turned out to be more profitable

Solution:
    Amount of Mr. sayyad after 2 years = $p {\left(1 +\frac{r}{100}\right)}^n$
                                                                  where p = principal ,r= rate , and n = years
                                                                = 40000 ${\left(1 +\frac{8}{100}\right)}^2$
                                                               = 40000 $\times$ $\frac{729}{625}$
                                                               = 64 $\times$ 729
                                                                = 46,656
    So,          interest = 46656 - 40000= 6656 in 2 years
  percentage return = $\frac{6656}{40000}\times 100$ = 16.64%
 now ,  MR Fernandez invested rupees 120000 in a mutual fund for two years after two years Mr Fernandez got 192000 
   So,      interest paid = 72000 in2 years
              hence , percentage return = $\frac{72000}{120000}\times 100 =60\%$
 So , Mutual fund investment MR Fernandez is more profitable.