Am scris ''/'' in loc de supra,nu gasesc aici.
c1/100=md1/ms1 ⇒ 10/100=md1/1,2 ⇒ md1= 10·1,2:100 => md1=0,12 kg
ms1=md1+m1 apa => 1,2=0,12+m1 apa => m1 apa=1,08 kg
c2/100=md2/ms2 => 40/100 = md2/1,8 => md2=1,8·40:100 => md2=0,72kg
ms2=md2+m2 apa=> 1,8=0,72+m2apa => m2 apa=1,08 kg
cf/100=mdf/msf => cf/100=0,12+0,72/mdf+mf apa => cf/100=0,84/0,84+1,08+1,08=> cf/100=0,84/3 =>cf= 0,84·100:3 => cf=28%
