![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
The surface area of a three dimensional object is the sum of the areas of the faces.
\If ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f4227bbb7a6b6af2de948f1db3af23a8.png\")
represents the lenght of the side of a cube.
Write a formula for surface area of the cube.
\A cube has ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ab26fd4c5c29d2067a1dab644bcb3065.png\")
faces.
Surface area of each face is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dfc2bd964dac1c6ed002ceb9ed305412.png\")
.
Therefore as a cube has ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ab26fd4c5c29d2067a1dab644bcb3065.png\")
faces, the surface area of the cube is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=affa8df007c07c911bab0ddb0951193d.png\")
.
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The formula for surface area of the cube is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=affa8df007c07c911bab0ddb0951193d.png\")
.