Posted by DeLynn Stewart on .
If a cylindrical container has a volume of cubic feet, then its surface
area S in square feet (excluding the top and bottom) is given by S = s=(2π )/r where r is the radius of the cylinder.
(a) Calculate S when r =1/2 foot
(b) What happens to this surface area when r becomes large? Sketch this situation

Math 209 
Henry,
My Eq for surface area(excluding top and bottom) does not agree with yours.
My Eq: S = 2pi*rh.
r = radius.
h = height.
Please check your Eq.
a. S = 2*3.14*0.5*h = 3.14h.
b. The surface ara increases with r.
; 
Math 10 
Caitlin,
A cylinder has a surface area of 250cm2. The height is twice as big as the radius. What is the height of the cylinder?