Question

find the curved surface area of a cone whose base radius is 21m and slant height is 30cm​

Answer 1

Answer:

CSA of a cone = pi * r* l

given , radius = 21 cm    , height = 30 cm

csa = 22/7 x 21 x 30

csa =  1980 cm

hence csa of cone = 1980 cm ^2 .

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