Task: Question Answering
Input (English): Problem: ron cycles his way up on a hill side and back . he takes the exact same route both ways . on the trip out he cycles an average speed of 5 miles per hour . on the trip back , downhill cycling at an average speed of 100 miles per hour , he is quick to return back . what is his approximate average speed for the round trip in miles per hour ? 
Options: a ) 8 , b ) 9.52 , c ) 10 , d ) 11.7 , e ) 20
Output (English): b