Answer:

Step-by-step explanation:

In the first question, it is asking how far apart they are from each other in they travelled in opposite directions for an hour. To answer this you just have to add the distance that they have travelled for an hour. Why? because just think of it, imagine it in simpler terms. Try to put it this way. You have a partner and both of you are facing opposite directions. Then, you both walked a step. Now when you will try to get to your partner's position after you both walked a step, you'll find out that you will need to take two steps to get to you partner's position. Sorry it is hard to explain but that is the best explanation I can give you. So just add the distance that they travelled for an hour then you will get the answer. Train a travels 92km/h, so it means that after an hour it has already travelled 92km. Train b travels 82km/h, so it means that after an hour it has already travelled 82km. Just add those two distances and you'll get the answer for the first question.

In the second question, you just have to multiply first the speed of each train to 2, then subtract each other. Why multiply to 2? because it says in the question that how far apart they will be in two hours? it says two hours. We are only given the distance each train can travel in one hour but that is enough, we can just multiply the distance that they can travel in hour to 2 then we can get the distance that they can travel in 1 hour. Next is to why to subtract? because it asks how far apart they are. It is asking for the difference. So just follow these and you'll get the answer for the second question.

Sorry I did not gave you an answer but just an explanation, but I hope that this helped you.