Task: Question Answering
Input (English): Problem: the length of a rectangular plot is 20 metres more than its breadth . if the cost of fencing the plot @ rs . 26.50 per metre is rs . 4240 , what is the length of the plot in metres ? 
Options: a ) 20 , b ) 200 , c ) 50 , d ) 400 , e ) 140
Output (English): c