Odpowiedzi

2009-10-26T22:08:07+01:00
0,1*250= 25 zaw octu
25/(250+x)=0,04*(250+x)
25/(250+x)=10+0,04x *(250+x)
25=(250+x)*(10+0,04x)
25=2500+10x+10x+0,04x²
20x+0,04x²=-2475
4 1 4
2009-10-26T22:19:33+01:00
Dane :
cp1 - 10%
Mr1 - 250g
Ms1 - ? ms1 = cp x mr / 100%
Cp2- 4% ms1 = 10 x 250 / 100
mr2 - ? ms1 = 2500 / 100 = 25
ms2 = ms1

ms2 = 25g
mr2 = ms2 x 100% / cp
mr2 = 25 x 100 / 4
mr2 = 2500/ 4
mr2 = 625
625 - 250 = 375
odp : nalezy dolac 375g wody.