![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Given diameter(d) of the circle is 15cm. \ \
\Formula of radius(r) of the circle ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=26000e468752b1c996c785322db2292b.png\")
.
The value of d=15 is substitute in ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=26000e468752b1c996c785322db2292b.png\")
.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f88b30ed4869b10aa77a1a5bf86e64c8.png\")
.
The Area A of a circle is given by the formula, ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a2221dcbd59cd760bc34c92547e4eba3.png\")
.
Where r is the radius of the circle.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
The value of radius,r=7.5 cm is substitute in .
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=041d3e47d4282bd0135b82e0dde669ac.png\")
\ \
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3b4221f0d9b933558e6b4c30ddce9a84.png\")
(Evalute power: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=bf87bd7d4b156b5c9f51f307ebab7c8f.png\")
)
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=970caa0dfe195bfdca41eccf698e0c6f.png\")
(Multiply: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=14443bd63086b8082917b892dc6ea800.png\")
)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The Area A of a circle is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=087cf91fe3059250b0c316cee4e4856b.png\")
.