Find the total surface area of solid circular cone with b...
Find the total surface area of solid circular cone with base radius 3cm and slant height 4cm. [Take π = 22/7]
37 5/7cm2
66cm2
75 3/7cm2
78 2/7cm2
88cm2
Correct answer is B
T.S.A of a cone = πr2+πrl
= 227×32+227×3×4
= 1987+2647
= 4627
= 66 cm2
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