Just need clarification...
Here's the problem.
A plane flew from a southern city to a northern city, a distance of 900 miles, against a 30mph headwind. On the return flight, the 30mph wind became the tailwind. The plane was in the air for a total of 5 and a half hours. What would the plane's average speed have been without the wind?
Isn't it the plane's average speed would still be the same?
However, I'm not really sure of this...
Would appreciate the Help.