document.write( "Question 777883: A concrete mixture is made by mixing cement, sand and gravel, by volume, in the ratio 1:2:4. If 2 m cubed of gravel is used, how much cement and sand must be added? \n" ); document.write( "
Algebra.Com's Answer #474305 by Cromlix(4381)\"\" \"About 
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The ratio is 1:2:4
\n" ); document.write( "If 2m^3 gravel is added.
\n" ); document.write( "then 0.5m^3 cement and 1m^3 sand
\n" ); document.write( "should be added.
\n" ); document.write( "(0.5:1:2)*2 = (1:2:4)
\n" ); document.write( "Hope this helps.
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