Question 767776: Town A and B are 400 miles apart. If a train leaves A in the direction of B at 50 miles per hour, how long will it take before that train meets another train, going from B to A, at the spped of 30 miles per hour?
A) 4 hours
B) 4 1/3 hours
C) 5 hours
D) 5 2/3 hours
E) 6 2/3 hours
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Town A and B are 400 miles apart. If a train leaves A in the direction of B at 50 miles per hour, how long will it take before that train meets another train, going from B to A, at the spped of 30 miles per hour?
------------
When going in opposite directions, the speeds are added.
---
d = r*t
t = d/r
|
|
|
