Find the total surface area of a right circular cone with radius 6 cm and height 8 cm.
We have,
Radius of right circular cone (r) = 6
Height of cone ( h) = 8 cm
∴ slant height (l) = 
= l =
=10 cm
Total surface area of cone = πr2+ πrl= πr(r+l)
= 
×6×16 cm2=301.71 cm2
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