document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=42075>Question 42075</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Question\r<BR>\n" );
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document.write( "An open water tank with length 20 cm and width 15 cm holds 4.8 litres of water.  Calculate the height of the water level in the tank and the total surface area of the cuboid in contact with the water.\r<BR>\n" );
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document.write( "This is what I have done\r<BR>\n" );
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document.write( "4.8 litre = 4800 cm^3 (cm cube) since 1 litre = 100cm^3\r<BR>\n" );
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document.write( "Let the height of the water level = h\r<BR>\n" );
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document.write( "Volume <BR>\n" );
document.write( "= Length x width x height = 4800<BR>\n" );
document.write( "20 x 15 x h = 4800<BR>\n" );
document.write( "300h =  4800<BR>\n" );
document.write( "h = 4800/300<BR>\n" );
document.write( "h=16\r<BR>\n" );
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document.write( "Total surface area of the cuboid<BR>\n" );
document.write( "= 2 ((length x width) + (length x height) + (width x height))<BR>\n" );
document.write( "= 2 ((20 x 15) + (20 x 16) + (15 x 16))<BR>\n" );
document.write( "= 2 (300 + 320 + 240)<BR>\n" );
document.write( "= 2 (1100)<BR>\n" );
document.write( "= 2200\r<BR>\n" );
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document.write( "But my teacher said that the answer is 1420 (for the total surface area). Who is right in this case ?\r<BR>\n" );
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document.write( "Please help. Tahnk you very much. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #554628 by </B><A HREF=/tutors/aboutme.mpl?userid=raiumarshair><B>raiumarshair(1)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=raiumarshair><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=554628\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Your teacher is right. When we add all surface areas then it is called total surface area. In your question tank is open from top so it has only 5 surface areas not 6 Because top surface area is not available.  So we add like this <BR>\n" );
document.write( "Total surface area= 1(length×width)+2 (length×hight)+2 (width×hight)<BR>\n" );
document.write( "Your answer willbe like your techer 1420 </SPAN>\n" );
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