Task: Question Answering
Input (English): Problem: there are two concentric circles with radii 10 and 6 . if the radius of the outer circle is increased by 20 % and the radius of the inner circle decreased by 50 % , by what percent does the area between the circles increase ? 
Options: a ) 11 , b ) 111 , c ) 211 , d ) 311 , e ) 411
Output (English): b