I guess you have all seen this type of question before? How do I solve it?
An aircraft with a speed of 250kts is overhead point E at 06:30. Another aircraft with a speed of 300kts follows the first aircraft and passes E at 06:36. At what distance from E will the faster aircraft catch up with the slower?
I'm having a hard time with math so please be as specific as possible (don't leave out "the obvious" steps please) and any shortcuts avoiding the equation all together would be greatly appreciated

How to think, what is what and why when solving it?
Thanks!