1. In what ratio salt costing Rs.13/kg mixed with another salt costing Rs.7/ kg to get a mixture costing Rs.9/kg?





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  • By: anil on 05 May 2019 02.03 am
    Let quantity of Rs. 13/kg and Rs. 7/kg salt mixed be $$x$$ and $$y$$ kg respectively. According to ques, => $$13x+7y=9(x+y)$$ => $$13x+7y=9x+9y$$ => $$13x-9x=9y-7y$$ => $$4x=2y$$ => $$frac{x}{y}=frac{2}{4}=frac{1}{2}$$ $$ herefore$$ Required ratio = $$1:2$$ => Ans - (D)
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