Elitmus Exam Numerical Ability Ratio and Proportion

two blends of a commodity costing rs 35 and rs 40 per kg respectively are mixed in the ratio 2:3 by weight.if 1/5th of the mixture is sold at rs46 per kg and the remaining at the rate of rs 55 per kg,the profit percent is

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Elitmus Other Question

gold is 19 times as heavy as water and copper is 9 times as heavy as water .in what ratio should these be mixed to get an alloy 15times as heavy as water? between two consecutive years my income are in the ratio of 2:3 and expenses in the ratio 5:9.if my income in the second year is rs45000 and my expense in the first year rs25000 then my total savings for the 2 years will be how much?