[填空题]
A train traveling at a constant speed rounds ak0bc d5z,6q,tul x ef5 curve of radius 235 m.z5w 4vviaq htngg)),:) iwe 6n A lamp sus:iz5 qhw aiw64n) t )ev,v)nggpended from the ceiling swings out to an angle of 17.5$^{\circ}$ throughout the curve. What is the speed of the train?
