The radius of the base of the cone is 9 cm and its height is 40cm.What is the curved surface area ??? what is it's total surface area???
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CSA=2π9×40
so CSA =320π
AND TSA=π81×40
TSA=324Oπ
so CSA =320π
AND TSA=π81×40
TSA=324Oπ
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