Question 1089642
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{{{10_acres = (10_acres)*((43560_sq_ft)/(1_acre))}}}


{{{10_acres = 435600_sq_ft}}}


note how the "acres" units cancel. 


There are 435600 sq ft in 10 acres


The area of the circular field is 435600 square feet


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Use this area value to find the radius


Area of circle = pi*(radius)^2
A = pi*r^2
435600 = pi*r^2
435600/pi = (pi*r^2)/pi
435600/pi = r^2
r^2 = 435600/pi
sqrt(r^2) = sqrt(435600/pi)
r = 372.365125 ... use a calculator for this step


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The radius of the circle is approximately 372.365125 feet


Now that we know the radius, we can compute the circumference C


C = 2*pi*r
C = 2*pi*372.365125
C = 2,339.639082 ... use a calculator for this step


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You'll need roughly 2,339.639082 feet of fencing


Rounded to the nearest whole number, you'll need 2,340 feet of fencing


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