1. The ratio in which a man must mix rice at 10.20 per kg and 14.40 per kg so as to make a mixture worth 12.60 per kg, is
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By: anil on 05 May 2019 02.25 am
Quantity in which man use rice at Rs. 10.20/kg = $$x$$ kg and at Rs. 14.40/kg = $$y$$ kg According to ques, => $$10.20x+14.40y=12.60(x+y)$$ => $$102x+144y=126x+126y$$ => $$126x-102x=144y-126y$$ => $$24x=18y$$ => $$frac{x}{y}=frac{18}{24}=frac{3}{4}$$ $$ herefore$$ he ratio in which a man must mix rice at 10.20 per kg and 14.40 per kg so as to make a mixture worth 12.60 per kg = $$3:4$$ => Ans - (A)
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