Given that :
Diameter of the chimney is 2.5 m
The circumference of the chimney =
The circumference of the chimney =7.85 m.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d3bd5737a796e3d5037dac90219994ec.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=afbfad572d799173f18b3f1f71bfc9a5.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1566d633466f833475d29f28d5862b06.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e0d61afdaf9060faced59df69dc50ef2.png\")