Can someone help me answer a word problem for a 9th grade summer review packet?

Question

I have spent a very long time looking at this problem. I have asked a lot of people and no one knows the answer or could help me in any way. Can someone please help me?

A plane flies against the wind from Center City to New City at a rate of 220mph. On the

return trip, the plane flies with the wind at a rate of 250mph. The return trip took one

hour less time. How far apart are the two cities? (remember rt =d)

note: rt=d means rate multiplied by time equals distance

Answer 1

220t=d

250(t-1)=d

d=d

250(t-1)=220t

250t - 250=220t

------------------------

100

25t - 25= 22t

-25t         -25t

-25=-3t

------------

-3

t=25/3

Possibly? Maybe it will atleast jog something in your memory. It's been a long summer and I haven't had to do much algebra. Sorry I couldn't be more certain of my answer. =\

Answer 2

30