Hey everyone. I was hoping to get some help on a good strategy on learning d=rt problems. I am having a hard time when it comes to airplanes flying in opposite directions, trains crashing together, and Bob making 3 trips because he lost his keys!

I got the 3rd edition of GMAT Word Translations, and while somewhat effective, I think it has confused me some more.

Would anyone have other resources that could possibly help me?