How many kilograms of cement containing $27.5 \%$ sand must be added to cement containing $20.0 \%$ sand to obtain $45.0 \mathrm{~kg}$ of cement that is $24.6 \%$ sand?

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The Answer of How many kilograms of cement containing $27.5 \%$ sand must be added to cement containing $20.0 \%$ sand to obtain $45.0 \mathrm{~kg}$ of cement that is $24.6 \%$ sand?

How Many Kilograms of Cement Containing 27.5%27.5 \%27.5% Sand Must Be Added to Cement Containing

How Many Kilograms of Cement Containing $27.5 \%$ Sand Must Be Added to Cement Containing