Plane A is 40 mi south and 100 mi east of Plane B. Plane A is flying 2 mi west for every mile it flies north, while Plane B is flying 3 mi east for every mile it flies south. Where do their paths cross? 60 mi east, 20 mi north Which plane must fly farther? What ratio of the speed of Plane B to the speed of Plane A would produce a mid air collision?