document.write( "Question 971423: Hi! Thanks for answering my question:\r
\n" ); document.write( "\n" ); document.write( "A cylindrical container with a radius of 68cm and height of 78cm is open at the top. What is its exact surface area in square centimetres?\r
\n" ); document.write( "\n" ); document.write( "Once again, thanks! :) \n" ); document.write( "

Algebra.Com's Answer #593906 by Edwin McCravy(20059) $\"\"$ $\"About$

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A cylindrical container with a radius of 68cm and height of 78cm is open at the
\n" ); document.write( "top. What is its exact surface area in square centimetres?
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document.write( "If the cylinder were open at the top and bottom ends, like the cardboard tube\r\n" );
document.write( "that's left after you use up all the toilet paper, the outside surface area\r\n" );
document.write( "would be given by\r\n" );
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document.write( " square centimeters.\r\n" );
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document.write( "But since it has a bottom, the bottom surface area is a circle, the area of\r\n" );
document.write( "which is\r\n" );
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document.write( " square centimeters.\r\n" );
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document.write( "The sum of the outside surface area and the bottom circle is a total of\r\n" );
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document.write( " square centimeters.\r\n" );
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document.write( "If it had a top you would add that again, but it doesn't, so the answer is\r\n" );
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document.write( " square centimeters.\r\n" );
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document.write( "[Since you are asked for the 'exact' surface area, don't use 3.14 or 3.1416\r\n" );
document.write( "for pi, for no decimal is 'exactly' equal to pi.]\r\n" );
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document.write( "Edwin

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