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C=4 la suta
Md=30 g
Mapa=?
Ms=?
Dau funda


Răspuns :

C=4%
md=30g
mapă =?
ms=?
C=md×100/ms
ms=md×100/C=30×100/4=75g
mapă =ms-md=75-30=45g
c/100=md/ms
4/100=30/ms
ms=30*100 / 4
ms=750
mapa=750-30=720