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19 January, 20:55

A metallurgist has an alloy with 15% titanium and an alloy with 20% titanium. He needs 100 grams of an alloy with 17% titanium. How much of each alloy should be mixed to attain the 100 grams of alloy with 71% titanium?

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  1. 19 January, 21:18
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    Ok so the answer in here is 60 grams of the alloy with 10% of titanium needed and 40 grams of the alloy with 25% of titanium are needed.

    Let me explain it to you

    let x = grams of alloy A and y = grams of alloy B.

    x + y = 100 which is mass of A + mass of B = 100

    and 0.15x + 0.20y = 0.17*100

    which is fractionA*massA + fractionB*massB = fractionTotal*massTotal

    0.15 (100 - y) + 0.20y = 17

    15 - 0.15y + 0.20y = 17

    0.05y = 2 y = 40 grams

    x = 100 - y = 60 grams
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