Two planes leave Toronto and New York City at the same time each day going to the other city on the same path. One plane travels at 550 km/h and the other at 600 km/h. Assuming the planes are travelling at the same height, how far apart are they one hour before they meet?

Answer 1

Since the two planes are traveling towards each other on the same path, their combined speed is 550 km/h + 600 km/h = <<550+600=1150>>1150 km/h.
In one hour, they will cover a distance of 1150 km/h * 1 h = <<1150*1=1150>>1150 km. Answer: \boxed{1150}.