A, B and C invest in the ratio of 3 : 4: 5. The percentage of return on their investments are in the ratio of 6 : 5 : 4. Find the total earnings, If B earns Rs. 250 more than A :

                                         A                  B                   C

investment                    3x                 4x                  5x

Rate of return              6y%              5y%                4y%

Return                         $\frac{18xy}{100} \frac{20xy}{100} \frac{20xy}{100}$                

               Total = (18+20+20) =  $\frac{58xy}{100}$

     B's earnings - A's earnings  =  $\frac{2xy}{100}$ = 250

     Total earning =  $\frac{58xy}{100}$ = 7250