Task: Question Answering
Input (English): Problem: if john covers a certain distance in 1 hr . 24 min . by covering two third of the distance at 4 kmph and the rest at 5 kmph , then find the total distance 
Options: a ) 4 km , b ) 6 km , c ) 6.8 km , d ) 7.2 km , e ) none of these
Output (English): b