There are two spheres of same radius and material at same temperature but one being solid while the other hollow.  Which sphere will expand more if they are heated to same temperature?

The hollow sphere may have air or a fluid inside it, which will result in increased pressure by heating, so as to bulge more than the solid sphere. So hollow will expand more.
But if there is no air then ΔV=VγΔT , the both will expand same.