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2016-04-12T22:49:16+05:30

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Given:
right circular cone
radius : 3 cm
slant height : 5 cm

Surface area of a cone = π r l + π r²
S.A. = 3.14 * 3cm * 5cm + 3.14 * (3cm)²
S.A. = 47.1 cm² + 28.26 cm²
S.A. = 75.36 cm²

75.36 cm² ÷ 2 = 37.68 cm² is the surface area of a single piece when the cone is cut into two exact pieces. 
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