Question 1134684
First rocket travels x hours
Second rocket travels x+0.9 hours
Distance is speed*velocity.  They both go the same distance
So 20000*x=14000(x+0.9)
20000x=14000x+12600
6000x=12600
x=2.1 hours
20000*2.1=42000 miles
14000*3.0=42000 miles ANSWER