Answer:
For a 7 hectare plot, the radius is 149.3 m.
For a 12 hectare plot, the radius is 195.5 m.
For a 30 hectare plot, the radius is 309.1 m.
Step-by-step explanation:
For a circular plot of area A, the radius is
[tex]r=\sqrt{A/\pi}[\tex]
One hectare is equal to 10,000 m2.
For a 7 hectare plot, the radius is
[tex]r=\sqrt{7*10,000/3.14}\\r=\sqrt{22,293}=149.3[\tex]
For a 12 hectare plot, the radius is
[tex]r=\sqrt{12*10,000/3.14}\\r=\sqrt{38,216}=195.5[\tex]
For a 30 hectare plot, the radius is
[tex]r=\sqrt{30*10,000/3.14}\\r=\sqrt{95,541}=309.1[\tex]
