Task: Question Answering
Input (English): Problem: a bus travels from town a to town b . if the bus ' s speed is 50 km / hr , it will arrive in town b 42 min later than scheduled . if the bus increases its speed by 509509 m / sec , it will arrive in town b 30 min earlier than scheduled . find : a ) the distance between the two towns ; b ) the bus ' s scheduled time of arrival in b ; c ) the speed of the bus when it ' s on schedule . 
Options: a ) 60 , b ) 37 , c ) 26 , d ) 28 , e ) 11
Output (English): a