Answer:
It will take 2.4 hours for the two trains to meet.
Explanation:
The train that is going 75 mph is going to travel farther.
Both trains will be traveling for the same amount of time.
In order for the two trains to meet, the sum of the two trains' distance will be 312 miles.
We can set up an equation
![75T + 55T = 312\\130T = 312\\T = (312)/(130)=(12)/(5)=2.4](https://img.qammunity.org/2020/formulas/mathematics/middle-school/sppsbt7uv191ebkb1owhxxwv3kbca8asy6.png)
It will take 2.4 hours for the two trains to meet.