3. From cities $A$ and $B$, which are $250 \mathrm{~km}$ apart, two motorcyclists set off towards each other at the same time. The speed of one of them is $10 \mathrm{~km} / \mathrm{h}$ greater than the speed of the other. After two hours of travel, they still had $30 \mathrm{~km}$ left to meet. Determine the speed of each motorcyclist.