One boat travels 10 kph faster than another. While one boat travels 125 km, the other travels 155 km. Find their speeds.

Let x be the speed of the slower boat.

The faster boat is x + 10 kph.

We know from the problem that:

x + (x + 10) = 125 + 155

2x + 10 = 280

2x = 270

x = 135 kph

So the slower boat is traveling at 135 kph and the faster boat is traveling at 135 + 10 = 145 kph.