Răspuns :
20kg.......3 litri
36kg........x litri
X=(36*3)/20
X=108/20
X=27/5
X=5,4 litri
20 kg...........3 l.
36 kg............x l
x = 3 * 36 /20
x = 108 / 20
x = 5,4 litri
36 kg............x l
x = 3 * 36 /20
x = 108 / 20
x = 5,4 litri