![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The length(l) of the photo is 7inches and its width(w) is 4inches.
\Observe the measurements of the photo, the photo has rectangular shape.
\The area of the rectangular photo ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=39bc1fb514e4f1179b37c01d9c420f23.png\")
.
The values of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1b2fb5e682cb75ace3b981f52368e0f0.png\")
are substitute in the equation, ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9ed6a2e78906caccdee9f1cf37da7353.png\")
. \ \
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=07f18daa758f908df701dc7ef779b094.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=02ef4727a46e3e136c68d6194e72b8a2.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e65accb2b8636be3b974b56d013088a3.png\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The area of the rectangular photo ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e65accb2b8636be3b974b56d013088a3.png\")
. \ \