Question 840455
A train left Chicago and traveled towards Dallas.
 Five hours later another train left for Dallas traveling at 40 miles per hour with a goal or catching up with the first train bound for Dallas.
 The second train finally caught up with the first train after traveling for three hours.
 How fast was the train that left first going?
:
Find how far the 2nd train traveled in 3 hrs at 40 mph
 (This is where it caught the 1st train)
3 * 40 = 120 mi
:
The 1st train had been traveling for 5 + 3 = 8 hrs
Find the 1st train's speed
{{{120/8}}} = 15 mph, a mighty slow train