A plane leaves Chicago headed for LA at 540 mph. One hour later, a second plane leaves LA headed for Chicago at 660 mph. If the air route from Chicago to LA is 1800 miles, how long will it take for the first plane to pass the second plane? How far from Chicago will they be at that time?

Answer 1

if we call x the flying time for the 2nd plane, then since distance = speed * time,

660x + 540(x+1) = 1800
x = 1.05 hours

So, how far did the first plane travel in 2.05 hours?