Răspuns :
[tex]L_{Volga}=3700 \ km \\ L_{Nil}=3700 \ km+2970 \ km \\ \boxed{L_{Nil}=6670 \ km} \\ L_{Dunare}=3700 \ km-2000 \ km \\ \boxed{L_{Dunare}=1700 \ km}.[/tex]
CE LUGIME ARE NILUL?
3700+2970=6870
CE LUNGIME ARE DUNAREA?
3700-2000=1700
3700+2970=6870
CE LUNGIME ARE DUNAREA?
3700-2000=1700