what is total surface area of cone having radius 3 cm and height 21
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Answer:
650.57 cm²
Step-by-step explanation:
Radius = 3 cm
Height = 21 cm
TSA of a cone = πr(l + r)
l = √h² + r²
l = √3969
l = 63 cm
TSA = 22/7 x 3 (63 + 3)
TSA = 650.57 cm ²
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