Task: Question Answering
Input (English): Problem: if a motorist had driven 1 hour longer on a certain day and at an average rate of 4 miles per hour faster , he would have covered 70 more miles than he actually did . how many more miles would he have covered than he actually did if he had driven 2 hours longer and at an average rate of 10 miles per hour faster on that day ? 
Options: a ) 100 , b ) 120 , c ) 140 , d ) 150 , e ) 160
Output (English): c