1. 20 kg of a mixture of wheat and husk contains 5% husk. How many kg more of husk must be added to make the husk content 20% in the new mixture?
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By: anil on 05 May 2019 02.07 am
% husk in 20 kg mixture = 5% => Quantity of husk = $$frac{5}{100} imes20=1$$ kg Let $$x$$ kg of husk is added According to ques, => $$x+1=frac{20}{100} imes(x+20)$$ => $$5x+5=x+20$$ => $$5x-x=20-5$$ => $$4x=15$$ => $$x=frac{15}{4}=3.75$$ $$ herefore$$ 3.75 kg of husk must be added to make the husk content 20% in the new mixture. => Ans - (B)
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