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math

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The ratio of zinc and copper in an alloy is 7:9. if the weight of copper in the alloy is 11.7 kg, find the weight of zinc in alloy?

  • math -

    zinc : copper = 7:9
    zinc/11.7 = 7/9
    zinc = 11.7(7/9) = ....

  • math -

    11.7 × 7/9

    =9.1 kg

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