Question

VAROG AM NEVOIE URGENT! DAU COROANA SI 30 PUNCTE

Answer 1

1.

ms1= 800g, c1%= 20%

m.apa= 400g

stim ca c% = mdx100/ms

=> md = ms1xc1/100 = 800x20/100 = 160g

ms.final = ms1 + m.apa = 800+400 = 1200g

c%final = mdx100/ms.final

= 160x100/1200 = 13,33%

2.

md= 300g , m.apa= 1700g

ms = md+m.apa = 300+1700 = 2000g

c% = mdx100/ms = 300x100/2000 = 15%

3.

md= 250g , c% = 50%

c% = mdx100/ms

=> ms = mdx100/c% = 250x100/50 = 500g sol.