lungimea drumului
|____|____|____|____|
1 zi
|____|
rest1 |____|____|____|
a 2-a zi
|____|____|
rest2 |__|__|
a 3-a zi
|__| 1/2 din rest2
a 4-a zi
|__| 60 km
Aflam cati km a parcurs a 3-a zi
60×2 = 120 ( rest2)
120:2 = 60 km
Aflam cati km a parcurs a 2-a zi
2×120 = 240 km
Aflam cati km a parcurs prima zi
240 :2 = 120 km
Aflam cati km a avut drumul
120×4 = 480 km
Verificare:
120+240+60+60 = 480