Task: Question Answering
Input (English): Problem: two friends plan to walk along a 43 - km trail , starting at opposite ends of the trail at the same time . if friend p ' s rate is 15 % faster than friend q ' s , how many kilometers will friend p have walked when they pass each other ? 
Options: a ) 21 , b ) 21.5 , c ) 22 , d ) 22.5 , e ) 23
Output (English): e