1t ...........30l.............6h
1t............x..................1h
x=30*1/6= 5l
1t.........5l........1h
10t.......y............1h
y=10*5/1= 50l
10t............50l..........1h
10t...........z..............9h
z=50*9/1= 450l
1500:450=3,3 ≈3 zile ii ajunge benzina