[填空题]
Two locomotives approach each other on parallel trau jk 3g(w:ohvb)rl.z7cks. Each has a speedseo 4) m(fgx/q of 95 km/h with respect to the ground. If they xfe4q ms()g/ oare initially 8.5 km apart, how long will it be before they reach each other? (See Fig. 2–30). min
