Question 23
A scientist was testing a piece of metal which contains copper and zinc. He found the ratio of metals was 2 parts copper to 3 parts zinc. Then he melted this metal and added 120 g of copper and 40 g of zinc into it, forming a new piece of metal which weighs 660 g.
What is the ratio of copper and zinc in the new metal?
What is the ratio of copper and zinc in the new metal?