Hi,
Question about writing equations for rate/distance problems.
If the problem states, train A starts traveling at 40 mph, and train B leaves 3 hours later at 60 mph. After how long will they catch up.
One way, correct, to write it would be : 40 (t + 3) = 60 t ---- since the distance traveled will be the same.
BUT
why can i not, and the answer is different, if i write it like this : 60 (t - 3) = 40 t ...
I am having a hard time understanding this ..... if someone could please elaborate![]()
Question about writing equations for rate/distance problems.
If the problem states, train A starts traveling at 40 mph, and train B leaves 3 hours later at 60 mph. After how long will they catch up.
One way, correct, to write it would be : 40 (t + 3) = 60 t ---- since the distance traveled will be the same.
BUT
why can i not, and the answer is different, if i write it like this : 60 (t - 3) = 40 t ...
I am having a hard time understanding this ..... if someone could please elaborate