Question

8 robinete umplu un bazin in 5 ore.In cate ore umplu acelasi bazin 10 robinete?

Answer 1

1)  8robinete.....5ore
     10robinete......x ore 
⇒marimile sunt i.p (invers proportionale )
10·x=8·5
10x=40
x = $\frac{40}{10}$
x=4 (ore )

Answer 2

1)8 robinete .................. 5 ore
10 robinete ..................x
10•x=8•5
10x=40
x=4 ore