SOLUTION: Babbitt metal is an alloy made up of 90% tin, 7% antimony, 3% copper. How many pounds of pure copper must be added to 150 pounds of the alloy so that it will contain 17% copper?

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Question 242727: Babbitt metal is an alloy made up of 90% tin, 7% antimony, 3% copper. How many pounds of pure copper must be added to 150 pounds of the alloy so that it will contain 17% copper?
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


The amount of pure copper in 150 lbs. of Babbitt is:

lbs.

The amount of pure copper in lbs. of pure copper is lbs.

The sum of the two quantities above is the amount of pure copper in the 17% alloy which can be represented by:



So we can say:



Just solve for


John