(i)Given:
CSA= 308 cm2
Slant height l of the cone = 14 cm
Let the radius of the circular end of the cone be r.
We know, CSA of cone =πrl
(308)cm2=(227×r×14)cm2⇒r=(30844)cm=7 cm
Therefore, the radius of the circular end of the cone is 7 cm.
(ii)Total surface area of cone = CSA of cone + Area of base
=πrl+πr2[308+227×(7)2]cm2=(308+154)cm2=462 cm2