A classic train A and train B question.?

Jose G: A classic train A and train B question.?
A passenger train leaves a train station four hours after a freight train leaves the same station. The freight train is traveling ten mph slower than the passenger train. Find the rate of the passenger train if the passenger train overtakes the freight train in 20 hours.

Answers and Views:

Answer by Tenacity
…Both trains simultaneously arrive @ a small town in the middle, called “Actually Try To Do Your Own Homework”.

Answer by The Young Professor
30 mph

Answer by Charlie R
Passenger train is traveling 60 mph. Freight train is traveling 50 mph.

Answer by X X
Distance = Rate x Time
Distance is equal for both trains because they are passing
Time is T+4 for the first train because it left early. Also, R for the first train is unknown, but R for train 2 is R(train 1) – 10.
So D(train 1) = R(train 1) x 4T
D(train 2) = R(train 2) x T
= [R(train 1)-10] xT
D(train 1) = D(train 2)
Now, solve for R(train 1)