Question

Find the volume and the surface area of the spheres in the following :

Radius= 2.1 cm 

Answer 1

 Radius = 2.1 cm 

Volume of sphere = `4/3pir^3`

= `4/3 xx 22/7 xx 2.1 xx 2.1 xx 2.1`

= 38.808 cm³

Surface area = `4pir^2`

= `4 xx 22/7 xx 2.1 xx 2.1`

= 55.44 cm²

Volume = 38.808 cm³ and Surface area = 55.44 cm²