Find the surface area of a sphere of radius:
(i)10.5 cm (ii) 5.6 cm (iii) 14 cm

Explanation

(i) `r=10.5cm`

`SA=4pir^2=4xx22/7xx10.5/10xx10.5/10=1386 cm^2`

(ii) `r=5.6cm`

`SA=4pir^2=4xx22/7xx5.6xx5.6=394.24 cm^2`

(iii) `r=14cm`

`SA=4pir^2=4xx22/7xx14xx14=2464 cm^2`