Answer :
Surface area of sphere formula:
4 pi r^2
Plug the radius in:
4 pi 2^2
=
4 pi 4
Plug pi in:
4x3.142x4 = 50.27 (2d.p.)
4 pi r^2
Plug the radius in:
4 pi 2^2
=
4 pi 4
Plug pi in:
4x3.142x4 = 50.27 (2d.p.)