SOLUTION: In a metal alloy,the ratio of zinc to copper is 3 to 16.If there are 720 lb of copper,how much zinc is there?

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Question 1010474: In a metal alloy,the ratio of zinc to copper is 3 to 16.If there are 720 lb of copper,how much zinc is there?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
We can set up the proportion
Zn%2FCu+=+3%2F16+=+x%2F720
Now multiply by 720 and get
2160/16 = x
x = 135 lb zinc