Question

Repede va rog 1 si 2 si dau si coroană ​

Answer 1

Nr. 1

1.

md = 32g , m.apa = 768g

=> ms = md+m.apa = 32+768 = 800g

c% = mdx100/ms

= 32x100/800= 40%

2.

ms = 200g , c% = 20%

=> md = msxc%/100

= 200x20/100 = 40 g zahar

3.

md = 10g, c% = 5%

c% = mdx100/ms

=> ms = mdx100/c%

= 10x100/5 = 200 g sol.

4.

ms = 400g , c% = 20%

c% = mdx100/ms

=> md = msxc%/100

= 400x20/100 = 80 g

m.apa = ms-md = 400-80 = 320 g apa

Nr.2

1.

md = 20g, m.apa = 80g

ms = md+m.apa = 20+80 = 100g sol.

c% = mdx100/ms

= 20x100/100 = 20%

2.

md = 56g, c% = 4%

c% = mdx100/ms

=> ms = mdx100/c%

= 56x100/4 = 1400 g sol.

3.

ms = 500g , c% = 10%

=> md = msxc%/100

= 500x10/100 = 50 g zahar

4.

m.apa = 400g , c% = 5%

ms = m.apa+md = 400+md

c% = mdx100/ms

5 = 100md/(400+md)

=> md = 2000/95 = 21,05 g