document.write( "Question 171060: If a 5x9x12 rectangular block of wood is painted red and then cut into 540x1x1x1 cubes, how many cubes will have red paint on them? \n" ); document.write( "

Algebra.Com's Answer #126277 by checkley77(12844) $\"\"$ $\"About$

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Wish I could draw a sketch of this block as it would require less explanations.
\n" ); document.write( "Only the outside blocks will be painted.
\n" ); document.write( "I've assumed the base is 9 by 12 with the height of 5.
\n" ); document.write( "The 2 ends are 2*5*9=90 blocks.
\n" ); document.write( "The 2 sides are 2*10*9=180 [the 10 allows for the ends being removed]
\n" ); document.write( "The top & bottom are 2*10*3=60 [the 3 allows for the sides being removed]
\n" ); document.write( "The sum of the outside blocks are:
\n" ); document.write( "90+180+60=330 blocks will be painted. \n" ); document.write( "

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