Question

6robunete umplu un bazin 2ore . 4 robinete cu acelasi Debit vor umple acekasi bazin in ...... ore

Answer 1

Avem marimi invers proportionale, deci vom proceda astfel:

6 robinete.........2 ore
4 robinete......... x

$\dfrac{6}{4} = \dfrac{x}{2}$
(Se egaleaza prima fractie neschimbata cu a doua inversata)

Deci:

$x= \dfrac{6*2}{4}= \dfrac{12}{4}=3 \ ore$

Asadar 4 robinete cu acelasi debit vor umple bazinul in 3 ore.

Answer 2

6 robinete.......2ore
4robinete.........x ore
6/4=2/x=>x=2•6/4=12/4=3ore
Sper ca acm e corect!!!