To get your answer of volume you will have to use the equation V = 4/3 π r³ cubic units, considering both the radius's, your equations will be 4/3 π 8 and 4/3 π 64, using these equations you can find the volumes of the spheres. B=268.082573107 (268 if rounded) and A=33.5103216383 (34 if rounded)