Daca 6 robinete umple un bazi in 60 de minute atunci 6 robinete??

Răspuns :

4 robinete ... 60 min

6 robine ... x

x = ( 4 × 60 ) ÷ 6 = 240 ÷6 = 40 min

4 robinete....60 minute
6 robinete...? minute
60×4=240 minute umple un robinet
240:6=40 minute umplu 6 robinete