Q. 34.2( 203 Votes )

The curved surfac

Answer :

(i) Slant height (l) of cone = 14 cm

Let the radius of the circular end of the cone be "r".


CSA of cone = πrl


308 cm2 = × r × 14


r =


= 7 cm


Therefore, the radius of the circular end of the cone is 7 cm.


(ii) The total surface area of cone = CSA of cone + Area of base


= πrl + πr2


= [308 + × (7)2] cm2


= (308 + 154) cm2


= 462 cm2


Therefore, the total surface area of the cone is 462 cm2

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