Task: Question Answering
Input (English): Problem: tanks a and b are each in the shape of a right circular cylinder . the interior of tank a has a height of 10 meters and a circumference of 9 meters , and the interior of tank b has a height of 9 meters and a circumference of 10 meters . the capacity of tank a is what percent of the capacity of tank b ? 
Options: a ) 75 % , b ) 90 % , c ) 100 % , d ) 120 % , e ) 125 %
Output (English): b