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.
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