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