Outer diameter $= 240$ m, so radius $= 120$ m.

Total area of circle $= \pi(120)^2 = 14,400\pi$.

Each sector has central angle $60°$, which is $\frac{60}{360} = \frac{1}{6}$ of the circle.

$\text{Area of each sector} = \frac{14,400\pi}{6} = 2,400\pi$