Added 50 grams of other alloy where 30% of silver contain to 40 grams of 20% of alloy of silver. What percent of silver in new structure? (to okrvglit)

270
1) 40*0.2=8 grams of Ag in 1 alloy 2) 50*0.3=15 grams of Ag in the 2nd alloy 3) 8+15=23 grams (Ag lump) 4) alloy Lump: 40+50=90 grams 5) Ag in alloy: 23/90*100=25.56 Answer: 26
190
Answer add