Question

Why does the smell of a perfume travel a few yards away?

Answer 1

we can get the smell of perfume sitting several metres away because perfume contain volatile solvent and diffuse faster and can reach people sitting several metres away

Answer 2

The molecules of odor/perfume are in a gaseous state and mixing with the molecules of air in the room. All of them undergo random motion at all times . The molecules often bump into each other, which causes them to mix if they were not mixed previously.