Question
A factory has a mixture containing 60% iron and 40%
copper. If 20 kg of copper is added, resulting in a mixture that is 50% iron, what was the initial weight of the mixture?Solution
Iron = 6x kg Copper = 4x kg When 20 kg of copper is added then, -Constable/1731125039-254.JPG)
2x = 20 x = 10 initial weight of the mixture = 10x = 100 kg
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