Register to reply 
Finding the Area or the Circumference of a gutter. 
Share this thread: 
#1
Aug910, 07:20 AM

P: 18

Hey Guys,
For a maths assignment, we were given this question to complete: http://nrich.maths.org/5673 I'm having an discussion with a friend of how best to approach it. Should I work out and differentiate the area or perimeter (for the circle)? If we're finding the cost of materials, then circumference would be more appropriate than the area. Or should we look at both? Sigh, isn't it always the most basic part of a problem that stumps us? Thanks for your assistance. 


#2
Aug910, 08:07 AM

Math
Emeritus
Sci Advisor
Thanks
PF Gold
P: 39,348

You want to minimize the perimeter (or circumference) for a fixed area.



#3
Aug910, 08:55 AM

P: 18

The same perimeter can have a varying area, correct? Or would it be the same area every time? For example, if I curve a piece of paper, I can make the shape wider or smaller, but the perimeter stays the same. Is the area changing even though perimeter stays constant? Thanks.



#4
Aug910, 12:55 PM

HW Helper
P: 3,515

Finding the Area or the Circumference of a gutter.



#5
Aug910, 02:47 PM

P: 18

So, (sorry to continue asking questions, but this is helping), would I find the perimeter of the circumference minus the perimeter of the arc? What role does area play in determining an equation?



Register to reply 
Related Discussions  
Pdf of area and circumference of a circle  Calculus & Beyond Homework  1  
Finding Perimeter/Circumference of part of a circle  Precalculus Mathematics Homework  5  
Finding the circumference of the loop in parametrics  Calculus & Beyond Homework  1  
Expressing area as a function of circumference  Precalculus Mathematics Homework  6  
Numerically determine area and circumference  General Math  5 