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un robinet umple un bazin intr-o ora, iar alt robinet umple acelasi bazin in 2 ore. In cat timp se umple bazinul daca ambele robinete curg in acelasi timp?

Puteti sa detaliati raspunsul?


Răspuns :

1robinet                                                                                                                                1h=60min  presupunem ca 1robinet umple bazinul in jumate   60:2=30min                           a ramas inca o jumatate  2robinet umple in 2h:2=1h                    Rs; bazinul este umplut intr-o 1h si 30