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Mathematics, 05.10.2019 18:20 TH3L0N3W0LF

Brass is made up of copper and zinc. every 100 grams of brass contains 20 grams of zinc. a) work out the weight of zinc in 60 grams of brass. brass contains 4 parts by weight of copper to 1 part by weight of zinc. b) work out the weight of copper in 350 grams of brass.

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Brass is made up of copper and zinc. every 100 grams of brass contains 20 grams of zinc. a) work out...
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