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The total surface area of a cone if its slant height is 21'm and its diameter of its base is 24'm is?
Wiki User
∙ 13y ago
Total surface area of cone = (pi*radius*slant height) + (pi*radius2)
Area = (pi*12*21) + (pi*122) = 1244.070691 or about 1244 square m
Wiki User
∙ 13y ago
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