Task: Question Answering
Input (English): Problem: manoj borrowed rs . 3900 from anwar at 6 % p . a . simple interest for 3 years . he then added some more money to the borrowed sum and lent it to ramu for the same time at 9 % p . a . simple interest . if manoj gains rs . 824.85 by way of interest on the borrowed sum as well as his own amount from the whole transaction , then what is the sum lent by him to ramu ? 
Options: a ) 22877 , b ) 5655 , c ) 2778 , d ) 6787 , e ) 1771
Output (English): b