Task: Question Answering
Input (English): Problem: one hour after yolanda started walking from x to y , a distance of 40 miles , bob started walking along the same road from y to x . if yolanda â s walking rate was 2 miles per hour and bob â s was 4 miles per hour , how many miles had bob walked when they met ? 
Options: a ) 24 , b ) 23.5 , c ) 22 , d ) 21.2 , e ) 25.32
Output (English): e