+0  
 
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avatar+3486 

Help.

NotSoSmart  May 16, 2017
 #1
avatar+90058 
+2

We need to find the radius

 

Circumference = 2 pi * r

 

37.68   =  2pi *r         divide both sides by 2pi

 

37.68/ (2pi)  = r

 

 

The  surface area  =  4 pi r^2......sub "r"  into this and we get

 

4pi  [ 37.68 / (2pi) ] ^2  ≈  451.9 km^2

 

 

cool cool cool

CPhill  May 16, 2017
 #2
avatar+3486 
+1

Thank you, I had figured it out just like that! :D thanks

NotSoSmart  May 16, 2017
 #3
avatar+90058 
0

OK, NSS.......good to see that you're catching on to some of this stuff......

 

cool cool cool

CPhill  May 16, 2017

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