document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=184498>Question 184498</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A company wants to make cardboard boxes that are 15 inches long,12 inches wide, and 6 inches high. How many square inches of cardboard will the surface of the box have?    I forgot the formula. All i know is-<BR>\n" );
document.write( "                                             Surface area= 2(?*?)+2(?*?)+2(?*?)\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #138505 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=138505\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Surface Area of a Rectangular Box = (Area of Bottom Face + Area of Top Face ) + (Area of Right Face + Area of Left Face ) + (Area of Front Face + Area of Back Face)\r<BR>\n" );
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document.write( "This simplifies to:\r<BR>\n" );
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document.write( "Surface Area of a Rectangular Box = 2 * (Area of Top Face) + 2*(Area of Side Face) + 2*(Area of Front Face)\r<BR>\n" );
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document.write( "Note: Area of Bottom Face = Area of Top Face, Area of Right Face = Area of Left Face, and Area of Front Face = Area of Back Face\r<BR>\n" );
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document.write( "Now let's draw a picture\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" src=\"http://i150.photobucket.com/albums/s91/jim_thompson5910/Algebra%20dot%20com/rectangularbox2.png\">\r<BR>\n" );
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document.write( "From the drawing, we see that the front face (in red) is 12 inches wide and 6 inches high. So the area of the front face is 12*6=72 square inches.\r<BR>\n" );
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document.write( "Also, we see that the side face (in blue) is 15 inches long and 6 inches high. So the area of the side face is 15*6=90 square inches.\r<BR>\n" );
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document.write( "Finally, we see that the top face (in green) is 15 inches long and 12 inches wide. So the area of the top face is 15*12=180 square inches.\r<BR>\n" );
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document.write( "So the total surface area is:\r<BR>\n" );
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document.write( "Surface Area of a Rectangular Box = 2 * (Area of Top Face) + 2*(Area of Side Face) + 2*(Area of Front Face)\r<BR>\n" );
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document.write( "Plug in the areas we previously found:\r<BR>\n" );
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document.write( "Surface Area of a Rectangular Box = 2 * (180) + 2*(90) + 2*(72)\r<BR>\n" );
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document.write( "Multiply:\r<BR>\n" );
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document.write( "Surface Area of a Rectangular Box = 360 + 180 + 144\r<BR>\n" );
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document.write( "Add\r<BR>\n" );
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document.write( "Surface Area of a Rectangular Box = 684\r<BR>\n" );
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document.write( "So the total surface area of the rectangular box is 684 square inches\r<BR>\n" );
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