SOLUTION: In an alloy of 100 pounds of zinc and copper there are 75 pounds of copper. How much copper must be added so that the alloy may be 10% zinc ?
Can you please give an equation and d
Algebra.Com
Question 937992: In an alloy of 100 pounds of zinc and copper there are 75 pounds of copper. How much copper must be added so that the alloy may be 10% zinc ?
Can you please give an equation and detailed explanation
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
The alloy contains 75 lbs copper in 100 lbs of alloy = 75%
So remaining is Zinc = 25 %
You need to reduce the zinc % to 10% by adding copper which contains no zinc
--- percent ---------------- Amount
Zinc in Alloy 25 ---------------- 100 lbs
copper 0 ---------------- x lbs
Mixture 10 ---------------- 100 + x lbs
25 * 100 + 0 x = 10 ( 100 + x )
2500 + 0 x = 1000 + 10 x
0 x -10 x = -2500 + 1000
-10 x = -1500
/ -10
x = 150 lbs copper
m.ananth@hotmail.ca
RELATED QUESTIONS
In an alloy of 100 pounds of zinc and copper there are 75 pounds of copper. How much... (answered by stanbon)
In an alloy of 150 pounds of zinc and copper there are 100 pounds of copper. How much... (answered by ankor@dixie-net.com)
In an alloy of 150 pounds of zinc and copper, there are 100 pounds of copper. How much... (answered by Boreal,stanbon)
An alloy of copper and tin is 20% copper. How many pounds of copper must be added to 20... (answered by ankor@dixie-net.com)
in a metal alloy, the ratio of zinc to copper is 3 to 15. If there are 630 pounds of... (answered by stanbon)
In a metal alloy, the ratio of zinc to copper is 3 to 17. If there are 476 pounds of... (answered by ankor@dixie-net.com)
Babbitt metal is an alloy made up of 90% tin, 7% antimony, 3% copper. How many pounds of... (answered by solver91311)
An alloy of copper is 10% copper and weighs 25 pounds. A second alloy is 18% copper. How... (answered by checkley77)
A given alloy contains 10% zinc and 20% copper. How many pounds of zinc and copper must... (answered by robertb)