Wednesday Puzzle SOLUTION: Closing the Gap

Always look for the simple solution. Ignore meaningless numbers. In this case, that number is the distance traveled.

All you need to do is figure out the rate of closure in miles-per-minute, and you have the distance the rockets will be one minute before they collide. The rockets are closing at a total rate of 24,000 miles-per-hour. This translates to 400 miles-per-minute, which means they will be 400 miles apart one minute before they collide.