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

Explanation

As we know that the surface area of sphere is `4pir^2`.

Radius = `r`

(i) `r=10.5cm`

S.A of sphere = `4xx22/7xx10.5^2` = `1386cm^2`

(ii) `r=5.6cm`

S.A of sphere =`4xx22/7xx5.6^2` = `394.24cm^2`

(iii) `r=14cm`

S.A of sphere = `4xx22/7xx14^2`=`2464cm^2`