Question

How much of an alloy with 30% copper must be added to 25 pounds of a second alloy which is 20% copper to create a 27% alloy?

Answer 1

amount@30% = 25(20%-27%)/(30%-27%)

if i recall my cramer correctly

Answer 2

looks to be 58 1/3 if i did it right

Answer 3

does 58.33 lbs sound right?

Answer 4

yes

Answer 5

ok tank u verry much