Task: Question Answering
Input (English): Problem: a mixture contains milk and water in the ratio 5 : 4 . on adding 30 litters of water , the ratio of milk to water becomes 5 : 7 . total quantity of milk & water before adding water to it ? 
Options: a ) 90 , b ) 120 , c ) 80 , d ) 70 , e ) 60
Output (English): a