Task: Question Answering
Input (English): Problem: a cistern can be filled by a tap in 2 hours while it can be emptied by another tap in 4 hours . if both the taps are opened simultaneously then after how much time will the cistern get filled ? 
Options: a ) 2 hr , b ) 5 hr , c ) 7 hr , d ) 1 hr , e ) 4 hr
Output (English): e