[填空题]
A solid right circular c(,r kkpo/, g0wzuo h(mw0 ixx;bbi.d rz kbfq0-:pm+41 b 0sxbone has a base 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 off zi0kx+d.r104bpsm bbb :bq- the larger cone, as shown in the diagram.
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. $cm^2$
