September 2018 1 20 Report

Procenty !

1. zad

a) 3%. to 3,

b) 15%. to 75,

c)75%. to 600,

d) 1 i jedna druga to 0,45

e) 3,5 to 55,3

f) 4,7 to 70,5

2. zad

Oblicz , ile czystej soli jest w 5000 kg roztworu wodnego tej soli , jeżeli sól to 31%. wagi zoztworu

3 zad .

Pewien stop zawiera 1,20 kg miedzi , co stanowi 15%. ciężaru stopu . Oblicz ciężar tego stopu .


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