an alloy consists of nickel zinc and copper in a ratio of 3:4:13. How many kilograms of each metal are neededto make 4 kg of this alloy????
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Step-by-step explanation:
let all three be 3x ,4x, 13x
3x+4x+13x =20x=4kg
x=4/20kg or 1/5 kg
now 3×1/5 , 4×1/5, 13×1/5
these are the KILOGRAMs of each metal are needed to make 4 kg of this alloy
cross checking 3/5+4/5+13/5=4 kg
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