.The percentage of copper in an alloy must be in between 46% and 56% .Find the range of amount of 60% copper alloy that must be mixed with 40% copper alloy in order to end up with 300 g of an alloy containing the desired percentage of copper.
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3:2 is the ratio of Copper and Zinc.
So, in 25 kg alloy contains 15 kg copper and 10 kg zinc.
Now if 5 kg zinc added then it becomes 15 kg now.
Thus the alloy now contains 15 kg of copper and same weight of zinc.
So in new alloy both copper and zinc are now 50%.
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