Question 904001
gaining speed 40 -30= 10 mph
headstart  30*2 =60 miles
time to catch up 60/10=6 hours
algebraic solution
30(t+2)=40t
30t+60=40t
60=40t-30t
60=10t
6=t
distance to meeting 6*40=240 miles

As much as I like to do these problems 
Submit one at a time and no similar problems.
Those two problem are the same except for the numbers