Solution:
(i) Given radius of the sphere, r = 14 cm
Surface area of the sphere = 4r2
= 4×(22/7)×142
= 4×22×14×2
= 2464 cm3
Hence the surface area of the sphere is 2464 cm2.
(ii) Given radius of the sphere, r = 10.5 cm
Surface area of the sphere = 4r2
= 4×(22/7)×10.52
= 1386 cm3
Hence the surface area of the sphere is 1386 cm2.