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Peste 200 g solutie de zahar de concentratie de 20% se mai adauga 10 g zahar.Ce concentratie are solutia obisnuita?

Răspuns :

ms1=200g
c1=20%
madaugat=10g
c2=?

md1=c x ms1/100=20 x 200/100=40 g
md2 =md1+madaugat=40+10 =50g
ms2=ms1+madaugat=200+10=210g
c=md2/ms2 x100=50/210 x100=23.80