Task: Question Answering
Input (English): Problem: to fill a tank , 25 buckets of water is required . how many buckets of water will be required to fill the same tank if the capacity of bucket is reduced to two - fifth of its present ? 
Options: a ) 52.5 , b ) 62.5 , c ) 72.5 , d ) 82.5 , e ) 81.5
Output (English): b