as the commercial jetliner is flying at 253 meters per second.
there are 60 seconds in 1 min, and 60 minutes in 1 hr, and so there are 3600 seconds in a hour
as the jetliner is flying 253 meters per second, you will multiply 253 x 3600.
You will then get 910800 meters in 6 hrs.
1 mile = 1609.34 meters, and so 910800 meters = 565.944882 miles.
rounding 565.944882, you will get 565.945, or 566 miles as your answer
hope this helps :D