[填空题]
A 95-m-long train begins )iext/fbp;7 iuniform accelerationr l(hawi-*kig mj.nlmhho (-t .2:4.ktuqu +u from rest. The front of the train hak kmu-t+.u h(-w.jil:t 4a(u.li*g h hnorqm2s a speed of $40 \; m/s$ when it passes a railway worker who is standing 240 m from where the front of the train started. What will be the speed of the last car of the train as it passes the worker? $m/s$
