Δt₁=15 min=0,25 h
x₁=v₁Δt₁
x₂=Δx-v₂Δt₁
x₁=x₂=>Δt₁(v₁+v₂)=Δx=>v₁+v₂=Δx/Δt₁=10/0,25=40
x₃=v₂Δt₂
x₄+Δx=v₁Δt₂=>x₄=v₁Δt₂-Δx
x₃=x₄=>Δt₂(-v₂+v₁)=Δx=>v₁-v₂=Δx/Δt₂=10/2=5
v₁+v₂=40
v₁-v₂=5
_____"+"
2v₁=45=>v₁=45/2=22,5 km/h
v₁=22,5 km/h=6,25 m/s
v₂=40-v₁=40-22,5=17,5 km/h
v₂=17,5 km/h=4,861 m/s