Question

Calculate the surface area and volume of a sphere of radius 7cm

Answer 1

Check out this
Hope this helps

Answer 2

surface area of sphere=4*22/7*r*r
=4*22/7*49
=4*22*7
=616.
volume of sphere=4/3*22/7*r*r
= 4/3*22/7*49
=4/3*22*7
=4/3*154
=205.33 ans.