x = distanta
t = timpul pana cand se intalnesc
x = v × t⇒ v = x /t⇒ v₁= x /t₁; v₂= x /t₂;
t₁=10; t₂=15
viteza1=v₁= x /t₁= x/10
viteza2=v₂==x /t₂= x/15
x=x₁+x₂ dar x = v × t
⇒x₁=(x/10) × t si x₂=( x/15) × t
(x/10) × t +( x/15) × t = x
t/10 + t/15 = 1⇒ 15t + 10t = 150
t = 150/25 = 6 ore
cei 2 biciclisti se vor intalni peste 6 ore
