Task: Question Answering
Input (English): Problem: a circular swimming pool is surrounded by a concrete wall 4 feet wide . if the area of the wall is 11 / 25 of the area of the pool , then the radius of the pool in feet is ? 
Options: ['a ) 22', 'b ) 20', 'c ) 9', 'd ) 8', 'e ) 1']
Output (English): b