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Cp=3,5%
mr=100%*7kg/3,5%
mr=200 kg
2) x+ 0,6x=32
1,6x=32
x=20
3.5%m = 7
0.035m = 7
m = 200 [kg]
2) l -szukana liczba
l + l-40%l = 32
l + 0.6l = 32
1.6l = 32
l = 20