Task: Question Answering
Input (English): Problem: a boy traveled from the village to the post - office at the rate of 12.5 kmph and walked back at the rate of 2 kmph . if the whole journey took 5 hours 48 minutes , find the distance of the post - office from the village . 
Options: a ) 5 km , b ) 7 km , c ) 9 km , d ) 10 km , e ) 12 km
Output (English): d