Two Runners Start 30 Kilometers Apart And Run Toward Each Other. They Meet After 3 Hours. One Runner Runs 2 Kilometers Per Hour Faster Than The Other Runner. What Rate Do They Run?

The sum of their speeds is (30 km)/(3 hr) = 10 kph.
The difference of their speeds is 2 kph (from the problem statement).

This has solutions like any other "sum and difference" problem.
The faster runner is running (10 + 2)/2 = 6 kph.
The slower runner is running (10 - 2)/2 = 4 kph.