Homework Help: Math 209

Posted by DeLynn Stewart on Saturday, July 9, 2011 at 6:14am.

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, Sunday, July 10, 2011 at 4:46pm
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, Monday, May 21, 2012 at 8:28pm
A cylinder has a surface area of 250cm2. The height is twice as big as the radius. What is the height of the cylinder?

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