Task: Question Answering
Input (English): Problem: a boy is traveling from his house to school at 10 km / hr and reached school 2 hours late . next day he traveled 20 km / hr and reached 1 hour early . then find the distance between house and school ? 
Options: a ) 50 km , b ) 45 km , c ) 33 km , d ) 60 km , e ) 54 km
Output (English): d