Question 287927
The difficulty is that we don't know the angles of departure from Chicago.
But do we need them?
Yes, because we are told they are 575 miles apart.
If the problem had just stated that the planes had traveled 575 miles then we could solve the problem.
I will assume that that was really meant.
(x+25)+x=575
2x+25=575
2x=550
x=275 mph
x+25=300 mph