A metalworker has a metal alloy that is 25% copper and another alloy that is 60% copper. How many kilograms of each alloy should the me
The metalworker should use kilograms of the metal alloy that is 25% copper and kilograms of the metal alloy that is 60% How many kilograms of each alloy should the metalworker combine to create 90kg of 35% copper alloy?
