The two trains question traveling 70 miles an hr how far will they be in 2 hrs How do you figure that out?

a train travelling 70 mph. therefore 70x2 = 140 miles

I agree on how you solve it with "That bird"

A more detailed explanation:

Speed is normally expressed as units of distance over time, in this case, it is expressed as "Miles per Hour", meaning it goes X miles each Hour.

Therefore, we have the following:

Speed of the train: 70 Miles each hour
Time elapsed: 2 hours

Therefore it travels "2" sets of 70 miles, meaning the train travels for 140 miles.

Why the question mentions that there are two trains is beyond me.

I assume you mean, "how far will the trains be from each other after two hours?" In that case, it is impossible to determine the answer because we don't know which direction each train is travelling in. For example, if both of them went in the same direction, they would be 0 miles apart after two hours. But if they went in completely opposite directions, they'd be 280 miles (70*2*2) apart after two hours.