[填空题]
A solid right circular c5 k+db8qu cjkd,3rs u3u ifa3+one has a bask:9kd-n 1 9 po: whctbvlfno,8e radius of 1818 cm and a slant height of 3030 cm. A smaller right circular cone, with a vertical height of 88 cm and a slant height of 1010 cm, is removed from the top of the larger cone, as shown in the dia-f8d 9 t1vkoc9n pnko:wbl h,:gram.
1.Calculate the radius of the base of the cone which has been removed. cm
2.Calculate the curved surface area of the cone which has been removed. $cm^2$
3.Calculate the curved surface area of the remaining solid. $cm^2$
