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Isabella has 40 m of fence with which to build a rectangular horse corral.

What is the maximum area she can enclose?

 

Enter your answer in the box.

 m²

 Mar 27, 2019
 #1
avatar+102417 
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The max area will be a circle

 

To find the radius....we have that...

 

Circumference   = 2pi * radius

 

40  = 2p  * radius        [ divide  both sids  by  2 pi]

 

40 / (2 pi)   = radius    =   20 /pi

 

And the area of the  circle is

 

pi * (radius)^2  =

 

pi * ( 20/pi)^2  =

 

400/pi    m^2  ≈   127.32 m^2

 

 

cool cool cool

 Mar 27, 2019

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