6l................... 1kg
9l...................x kg
x= [tex] \frac{9}{6}= \frac{3}{2} =1,5 [/tex]
6l..................1kg
xl...................2kg
x= 6*2=12 l
6l...............1kg
15l.............x kg
x= [tex] \frac{15}{6}= 2,5[/tex] kg
6l................1kg
xl.................5kg
x=5*6=30l