两车的长度和为:200+280=480(米);
则客车的速度为:
(480÷20+480÷120)÷2
=(24+4)÷2,
=14(米/秒);
货车的速度为:
480÷20-14,
=24-14,
=10(米/秒);
答:客车的速度是每秒14米,货车的速度是每秒10米.
一列客车车长280米,一列货车车长200米,在平行的轨道上相向而行,从两个车头相遇到车尾相离经过20秒.如果两车同向而行,货车在前,客车在后,从客车头遇到货车尾再到客车尾离开货
一列客车车长280米,一列货车车长200米,在平行的轨道上相向而行,从两个车头相遇到车尾相离经过20秒.如果两车同向而行,货车在前,客车在后,从客车头遇到货车尾再到客车尾离开货车头经过120秒.客车的速度和货车的速度分别是多少?
数学人气:256 ℃时间:2020-03-29 06:18:58
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