火车通过路程s=1900m+200m=2100m,
∵v=
s
t ,
∴火车过桥时间:
t=
s
v =
2100m
20m/s =105s;
整列火车通过大桥所用时间是150s,则这列火车的速度:v′=
s′
t′ =
2100m
150s =14m/s.
故答案为:105;14m/s.
火车通过路程s=1900m+200m=2100m,
∵v=
s
t ,
∴火车过桥时间:
t=
s
v =
2100m
20m/s =105s;
整列火车通过大桥所用时间是150s,则这列火车的速度:v′=
s′
t′ =
2100m
150s =14m/s.
故答案为:105;14m/s.