formula needed

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formula needed

Postby manfriday » Thu May 10, 2007 6:54 am

What's the formula to figure out the diameter of a circle if you know the acreage inside it?
A 100 square mile area (64000 acres) in a circular shape, would have what diameter?
A 50 square mile area (32000 acres) in a circular shape, would have what diameter?
Anyone know the formula to share with me?
Thanks,
ManFriday
manfriday
 
Posts: 2
Joined: Thu May 10, 2007 5:49 am

Postby Guest » Thu May 10, 2007 9:16 am

A = (pi/4)*d^2

So d = SQRT(4*a/pi)

for 100 sq miles, d = 11.28 miles approx.
Guest
 

Postby manfriday » Thu May 10, 2007 10:09 am

Thanks !!!
manfriday
 
Posts: 2
Joined: Thu May 10, 2007 5:49 am


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