document.write( "Question 1185379: The length and the width of a rectangular parallelepiped are 20m and 30m.Knowing that the total area is 6200m² calculate the height of the box and measure the volume.
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Algebra.Com's Answer #816230 by greenestamps(13200) $\"\"$ $\"About$

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\n" ); document.write( "Let the height be x.

\n" ); document.write( "The surface area of 6200m^2 consists of two faces of x by 20, two of x by 30, and two of 20 by 30:

\n" ); document.write( " $\"2%2820x%29%2B2%2830x%29%2B2%2820%2A30%29=6200\"$
\n" ); document.write( " $\"40x%2B60x%2B1200=6200\"$
\n" ); document.write( " $\"100x=5000\"$
\n" ); document.write( " $\"x=50\"$

\n" ); document.write( "The height is 50m; then the volume (in m^3) is length times width times height.

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