Task: Question Answering
Input (English): Problem: pavan travelled for 11 hours . he covered the first half of the distance at 30 kmph and remaining half of the distance at 25 kmph . find the distance travelled by pavan . 
Options: a ) 298 km , b ) 278 km , c ) 278 km , d ) 300 km , e ) 267 km
Output (English): d