You can put this solution on YOUR website! The answer is found by a simple method. First you must find out how many seconds are in an hour. So one hour is 60 minutes and one minute is 60 seconds. So 60*60 is 3600 seconds per hour. In the question you are given the about for 10 seconds. So you take 3600 seconds/ 10 seconds and get 360. You now know how many 10 seconds are in 1 hours so you then take 360*550 to get you answer which is 198,000 feet per hour.