Two planes, which are 1810 miles apart, fly toward each other. their speeds differ by 55 mph. if they pass each other in 2 hours, what is the speed of each?

For this problem what i did was take 1810 and divided by 4 (2 for it taking 2 hours and 2 more for there being 2 planes) to find the average speed of each plane and go 452.5. then i added and subtracted (individualy) 55/2 (27.7) to get the answers of 480 and 425. so one plane is going 480 miles per hour while the other plane is going at 425 miles per hour in the opposite direction.

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There is no list or tables and charts for me to answer your question