Q. 154.7( 18 Votes )

Curved surface area of a cone is 308 cm2 and its slant height is 14 cm. Find the radius of the base and total surface area of the cone.

Answer :

We have,


Curved surface area of cone =πrl= 308 cm2


Slant height =l = 14cm


=× r × 14 = 308 = r = 7 cm


Total surface area = πrl+πr2=308 +×72


= 462 cm2


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