I don't understand this.. and i need help asap

I think this has to do with parabolas and if they’re curved up or down

At 9am, a freight train leaves boston for nyc, traveling at an average rate of 24 miles per hour. at noon, a passenger train sets out on the same route, traveling at an average rate of 60 miles per hour. how far from boston do the two trains pass each other?

at noon, the freight train is 72 miles away (24*3).



the pass train "gains on" it at 36 mi/hr (60 - 24).
they meet at 72/36 = 2 hours.

distance from bos = 2*60 = 5*24 = 120 miles