Answer
time = 1.4 hours
Step-by-step explanation:
Two trains moving in different directions
One move due east and another move due west
Distance = rate x time
For train moving in opposite direction, the total rate will be sum together
Rate due east = 90 miles per hour
Rate due west = 70 miles per hour
Total rate = rate due east + rate due west
Total rate = 90 + 70
Total rate = 160 miles per hour
Distance = 224 miles
Calculate the time?
Distance = rate x time
time = distance / rate
time = 224/160
time = 1.4 hours
Therefore, it will take the two trains 1.4 hours to be 224 miles apart