If I go from point A to point B at an average speed of 30 miles per hour, how fast must I go from point B back to point A so that my average speed for the entire trip is 60 miles per hour?
What am I if:
the man who made me, sold me.
the man who bought me, never used me.
and, the man who used me, never saw me.
If I go from point A to point B at an average speed of 30 miles per hour, how fast must I go from point B back to point A so that my average speed for the entire trip is 60 miles per hour?