The diameter of a cone is 12 cm and its height is 8 cm. Find the curved surface area
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answer of this question is 20 cm^2
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r= 12/2= 6 cm. , h = 8 cm. , l=√(r^2+h^2)= √(6^2+8^2) = 10 cm. Total surface area of a cone = π
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