Question

Two buses are moving towards each other, one at a speed of 40 mph and the other at a speed of 50 mph. How much closer to each other will they be in one hour? In two hours? In three hours?

Answer 1

They will be closer by ten hours but farther by ten as more hours pass by. So you forgot a starting distance of where it starts. If this is needed to be answered specifically, you'll need more information to support answers. Now what I told you is the straying answer.

Answer 2

What is the starting distance