![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The height (h) of the triangle is 10 feet and its base (b) is 4 feet.
\The formula for the area of triangle is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b4ba4d9b038f32035b714c0a23fa5235.png\")
.
Substitute the values of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e004ab5af5a907b61a6576dbaa83b893.png\")
in the area formula of triangle.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e99a6b6ff14ab9a0572a0ce439a7fc3d.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6e1c19259e5db53f1e71b287f271a5df.png\")
Cancel common terms.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8da6ae1dcac1cf199109b732f4c85bbb.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=93b9da35cd71b60b4772b0f17da834b6.png\")
.![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
The width (w) of the rectangle is 1.6 feet and its length (l) is 25 feet.
\The formula for the area of rectangle is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5102fd71b29490e1b8a410c1f69cf224.png\")
.
Substitute the values of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2ba89d0593efec16af7a35013dc847df.png\")
in the area formula of rectangle.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0dbf65c8bfb7f9f33a6997ab13b053e0.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=51975660e2c9d53607d1b08e844dfa1a.png\")
.![\"\"](\"/userfiles/image/steps_images/step3.JPG\")
\ \
The width (w) of the rectangle is 3.5 feet and its length (l) is 4 feet.
\The formula for the area of rectangle is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5102fd71b29490e1b8a410c1f69cf224.png\")
.
Substitute the values of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ca6354187756c145714aa1386af7573f.png\")
in the area formula of rectangle.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0a9572a4eff6e164709b66a7bdb0a717.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3e32baa498dd1e08e5f5a885277c75d4.png\")
.![\"\"](\"/userfiles/image/steps_images/step4.JPG\")
\ \
The width (w) of the rectangle is 5 feet and its length (l) is 16 feet.
\The formula for the area of rectangle is .
Substitute the values of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=358e6ec721f9010b87821f31585a4370.png\")
in the area formula of rectangle.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=71f11a17b9e3e7201cba607bd8c9756c.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=549a24aec3e43db4e9ce523feca261be.png\")
.![\"\"](\"/userfiles/image/steps_images/step5.JPG\")
\ \
The width (w) of the rectangle is 0.4 feet and its length (l) is 50 feet.
\The formula for the area of rectangle is .
Substitute the values of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=288ba8ca366562dd133db3600069a41e.png\")
in the area formula of rectangle.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7b1ce6bfb7cc687bcc94983747487aa7.png\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=93b9da35cd71b60b4772b0f17da834b6.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The option D is correct answer.