An ore contains 26% of copper . To get 91 kgs of copper the quantity of are required is -

An ore contains 26% of copper . To get 91 kgs of copper the quantity of are required is - Correct Answer 350 kg

26 kg of copper is contained in 100 kg of ore. [As the ore contains 26% copper] So,  91 kg of copper is contained in 100 x 91 / 26 =  350 kg of ore.
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