Ordinary sugar contains 32% impurities, while processed sugar has 18% impurities.How many kilograms of ordinary sugar must be processed to yield 102 kg of processed sugar?
amount of processed sugar = 102 kg.
amount of pure sugar in this = 82% of it = 83 kg (approx)
we need x kg of ordinary sugar which contains 83kg of pure sugar.
ordinary sugar has 68% pure sugar.
so basically 2/3(approx) of ordinary sugar is pure sugar.
pure sugar = 83
so ordinary sugar = 83 x (3/2)=123 (approx)
did approximations as options are quite far apart.
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