Task: Question Answering
Input (English): Problem: a biker covered half the distance between two towns in 2 hr 30 min . after that he increased his speed by 2 km / hr . he covered the second half of the distance in 2 hr 20 min . find the distance between the two towns and the initial speed of the biker . 
Options: a ) 140 , b ) 120 , c ) 130 , d ) 150 , e ) 160
Output (English): a