[填空题]
Calculate the moment of i5(2d8 flzd1( l9rhr qzzdifod .x:pr /p-.og nnertia of a bicycle wheel 66 /qqlbx,sn7x* .7 cm in diameter. The rim and tire have a combined mass of 1.qn7xbls/*qx, 25 kg. The mass of the hub can be ignored (why?). $kg \cdot m^2$