Mathematics, 28.01.2021 01:00 S28073161

Catridge brass contains 30% sinc, and rivet brass contains 37% zinc. How much brass containing 25% zinc must be melted into 20kg rivet brass to change it to cartridge brass?

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Catridge brass contains 30% sinc, and rivet brass contains 37% zinc. How much brass containing 25% z...

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