Question 84731


Surface Area of a sphere = {{{4*pi*r^2}}}

So, Area of a sphere of radius a = {{{4*pi*a^2}}}
 
    Area of a sphere of radius b = {{{4*pi*b^2}}}

Ratio of the areas = {{{(4*pi*a^2)/(4*pi*b^2)}}} = {{{a^2/b^2}}}