Task: Question Answering
Input (English): Problem: a student reached his school late by 20 mins by travelling at a speed of 9 kmph . if he had travelled at a speed of 12 kmph , he would have reached his school 20 mins early . what is the distance between house and school ? 
Options: a ) 24 , b ) 25 , c ) 26 , d ) 27 , e ) 28
Output (English): a