Question

va rog cu regula de trei simplă ,am nevoie urgent de ele ​

Answer 1

Răspuns:

4.

ms=300g

C=10%

md=?

md=msxC/100=300×10/100=30g

sau

100g.........10%

300g........x%

x=300×100/100=30g

5.

md=30g

m apă =170g

ms=md+ mapă =30+170=200

C=mdx100/ms=30×100/200=15%

6.

ms1=9kg

C1=3%

C2=6%

md1=C1xms1/100=3×9/00=0,27kg

ms2= md1x100/C2=0,27×100/6=4,5kg

m apă eliminată = ms1-ms2=9-4,5=45kg