stim ca c% = mdx100/ms
ms1 = 500 g , c%1 = 20%
=> md1 = ms1xc%1/100 = 100 g
ms2 = (ro) p x Vs = 1,3067x300 = 392 g , c%2 = 40%
=> md2 = ms2xc%2/100 = 156,8 g
md3 = 43,2 g
=> md.tot = md1 + md2 + md3 = 100+156,8+43,2 = 300 g
=> ms.tot = ms1 + ms2 + md3 = 500+392+43,2 = 935,2 g
=> c%.final = md.totx100/ms.tot = 300x100/935,2
=> c%.final = 32%