document.write( "Question 997600: what is the total surface area of the cylinder that has a diameter of 12 meters and a height of 9 meters? \n" ); document.write( "
Algebra.Com's Answer #615624 by addingup(3677)\"\" \"About 
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Does the cylinder have caps on the ends or is it so if you look down one end you can see clear through the other side?
\n" ); document.write( "Diameter of 12. The perimeter is:
\n" ); document.write( "2rPi and since 2 times radius is the same as diameter, we take a short cut:
\n" ); document.write( "12Pi= 37.7 and
\n" ); document.write( "37.7*9= 339.30 is the area of one side of the cylinder, and since the problem says \"total surface area\" we should multiply this times 2: 678.6 is the total area of the cylinder with open ends.
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\n" ); document.write( "If you find out you need the end caps add the result below to 678.6:
\n" ); document.write( "Area of a circle: r^2Pi
\n" ); document.write( "6^2Pi
\n" ); document.write( "36Pi= 113.1 The cylinder has two ends, that's two caps inside and out, four surfaces, so:
\n" ); document.write( "113.1*4= 452.4
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