Task: Question Answering
Input (English): Problem: a car going at 10 miles per hour set out on an 80 - mile trip at 9 : 00 a . m . exactly 10 minutes later , a second car left from the same place and followed the same route . how fast , in miles per hour , was the second car going if it caught up with the first car at 10 : 30 a . m . ? 
Options: a ) 45 , b ) 20 , c ) 53 , d ) 55 , e ) 60
Output (English): b