SOLUTION: Find the expense at 60 cents a square foot of polishing the curved surface of a marble column in the shape of the frustum of a right circular cone whose slant height is 12 feet and
Algebra ->
Surface-area
-> SOLUTION: Find the expense at 60 cents a square foot of polishing the curved surface of a marble column in the shape of the frustum of a right circular cone whose slant height is 12 feet and
Log On
Question 575073: Find the expense at 60 cents a square foot of polishing the curved surface of a marble column in the shape of the frustum of a right circular cone whose slant height is 12 feet and the radii of whose bases are 3 feet 6 inches and 2 feet 4 inches respectively. Answer by Earlsdon(6294) (Show Source):
You can put this solution on YOUR website! The lateral surface area (S) of a frustum of a right circular cone is given by: where: and are the radii of the top and bottom respectively and s is the slant height. Use } approximation. sq.ft.
The cost of polishing, at $0.60 per square foot is:
226.08($0.60) = $135.65
(