[填空题]
In a school playground, the grass is watered by h m3nc4-(a xj,j.jx:f iyl*v blawn sprinklerro* j6mtm1x+y9 f i4ens that are set to spray at an ay9ot1 4+ije6f mnxrm*rc of $220^{\circ}$ with a maximum spray distance of 55 metres, as shown in the diagram below.
1.Calculate the area of grass that is watered by this sprinkler. $m^2$
2.Calculate the length of the sprinkler arc edge, where the maximum
spray distance lands. m
