Milk is poured into a hemispherical pot of diameter 42 cm from a cylindrical can. The radius of the cylindrical can is half of the radius of the hemispherical pot. The cylindrical can with total height 66cm has a conical lid. Find the curved surface area of the conical lid.
1
478.5 sq.cm
2
422 5 sq.cm
3
485.6 sq.cm
4
488.9 sq.cm
5
435.5 sq.cm