Question

daca 4 robinete pot umple bazinul in 6 ore aflati cate ore pot umple 12 robinete cu acelasi debit bazinul

Answer 1

invers proportional 4robinete...6h atunci 12robinete...x h
=> bazinul va fi umplut in 2h

Answer 2

4 robinete...............6 h
12 robinete .............x

$x=\frac{4*6}{12}=\frac{24}{12}=2~ h$