Răspuns :
100 - 40 = 60% drumul ramas
60% ....................90 km
100% ................... x km
x = 90 x 100 : 60 = 150 km lungimea intregului drum
60% ....................90 km
100% ................... x km
x = 90 x 100 : 60 = 150 km lungimea intregului drum
90 km -60%
x -40%
x=90 x 40=60km
60
60km + 90 km=150 km- totalul
x -40%
x=90 x 40=60km
60
60km + 90 km=150 km- totalul