Easy physics question (3 rep)

[paris hilton]

A jetliner has a cruising air speed of 620mph relative to the air.

Part B
How long does it take this plane to fly round-trip from San Francisco to Chicago, an east�west flight of 2000 miles each way, if the wind is blowing at 120mph from the west to the east?



I've tried 8 hours.
and 7.225 hours.


Help

[wrath]

620 + 120 one-way = 740
620 - 120 one-way = 480

2000/740 mph = 2.70
2000/480 mph = 4.16

= 6.86 hours ~ 6 hours 51 minutes.

[paris hilton]

620 - 120 one-way = 480


is 500

---------- Post added at 12:36 PM ---------- Previous post was at 12:35 PM ----------

i got 6.7

your method makes sense

[wrath]

Don't judge me. I just woke up five minutes ago. :P <3 But yeah, the method is definitely correct. I promise.

[paris hilton]

im scared, i use 2 attemps on my online homework, and the next is my last ):


but ill have a friend enter it for me to see if it right later.

ill give you rep

are you in any Physics classes

[wrath]

No I'm 24, but I finished Calculus my junior year in high school. So yeh. I'm a math nerd. But I've done a lot of drugs so it's all kind of fuzzy. xD I just remember this one because my friend and I argued about the method in physics class.

---------- Post added at 11:44 AM ---------- Previous post was at 11:41 AM ----------

I hate those online shits. My girlfriend did a math class online a year or so ago and I hate it. Because it has no common sense filter. You know, if I'm telling you the answer is 6 and 1/2 but the program is all like O NU WE MUST HAVE 6.5 OR WE COUNT IT WRONG LULRULZURLULZRZ......

Yeah. I hate that shit. Anyways. Good luck of course. :)

[paris hilton]

ill try the answer out later thanks so much