Răspuns :
Intr-o ora, cele doua trenuri parcurg 20+30=50 km, deci vor parcurge 100 km in doua ore. Raspuns corect c).
V v
→ ←
|___________________|_______________|
A C B
distanta dintre A si B = 100 km ;
V=30 km/h si v=20 km/h ;
t= timpul dupa care se intalnesc
[tex]t=\frac{d}{V+v}[/tex]
t = (100 km ) / (30km/h+20km/h) = 100/50 = 2 h
→ ←
|___________________|_______________|
A C B
distanta dintre A si B = 100 km ;
V=30 km/h si v=20 km/h ;
t= timpul dupa care se intalnesc
[tex]t=\frac{d}{V+v}[/tex]
t = (100 km ) / (30km/h+20km/h) = 100/50 = 2 h