Question

if the surface area of a sphere is 154cmssquare in it radius

Answer 1

take the formula area=pi * r^2
then the area will be 7cm

Answer 2

surfacearea of a sperre is= 4pie r^2
therefore                    154=4* 22/7*r^2
                     154*7/4*22 =r^2
                          12.25 =r^2
                            r=3.5cm