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31,5 / 7 = 4,5
20 * 4,5 = 90l
2)
150 / 6= 25 sek
20l = 7kg
X
xl = 31,5
x= 20 * 31,5
-----------
7
x = 90
Zadanie 2
1s = 6
X
xs = 150
x= 150*1
-------
6
x= 25
20l mleka =7kg śmietany
20:7=2,85l
2,85l mleka= 1 kg smietany
2,85:2=1,42
1,42l mleka = 0,5 kg smietany
2,85*31=88,35
88,35 + 1,42=89,77
potrzeba ok 89,77 l mleka = ok. 90 l
150:6=25
Naliczymy po 25 sekundach