Amos Tomlin: If train A is going 50 mph east,and Train B is going 70 mph west, at what time will they cross paths
Well, that would depend a bit on how far apart they are, wouldn't it?
Suppose for instance that they are 120 miles apart, then after 1 hour train A would have travelled 50 miles, and train B would have travelled 70 miles... so they would meet after 1 hour then!
+135 
