Milla and luka are 3 kilometers apart and walking toward each other. milla's average speed is 5 kilometers per hour and luka's is 4 kilometers per hour.

Milla's speed is faster and Luka's speed is slower. when the both of them are together, in a line it should look like this:
oThe one with the o is when they would get together again. see that the o is not in the middle. That's what happens when Milla's speed is faster and Luka's speed is slower