[填空题]
A plot of farmland is shown j0v u8 (/ri/1pk ak5todykhi/by the shaded region in the f 2io2tl* e7z4fb:l9qn a, qkrdiagram below. The plot has a curved border which can be described as an arf:o q*rli4be9l 2nt,k 27zqaf c, PQ, of a circle with centre O and radius,$r=500m$, such that $PÔQ =80^{\circ}$ The straight border of the farmland is defined by the chord PQ.
The farm owner wishes to construct a fence along the curved border of the plot.
1.Find the length of the fence to be built. m
2.Find the area of the farmland, rounding your answer to the nearest $m^2$. $m^2$
