document.write( "Question 1202301: The mass of a substance varies directly as the volume of the substance. If the mass of 7 liters of the substance is 42 kilograms, what will be the volume in liters of 63 kilograms of the substance? \n" ); document.write( "

Algebra.Com's Answer #837020 by math_helper(2461) $\"\"$ $\"About$

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document.write( "You can calculate the density (mass per unit volume) easily enough:
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document.write( "42kg/7l = 6kg/l\r
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document.write( "Now you can use the density to compute volume of a given mass, by dividing:
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document.write( "  V = 63kg / (6kg/l) =  10.5l \r
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document.write( "---
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document.write( "For this problem,  a proportion would also work:\r
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document.write( "  7/42 = x/63  -->  x = 63*7/42 = 10.5 \n" );
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