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学校运动会4×400米比赛,甲班最后一名选手起跑时,乙班最后一名选手已经跑出20米。已知甲班选手跑8步的路程乙班选手只需要跑5步,但乙班选手跑2步的时间甲班选手能跑4步,则当甲班选手跑到终点时,乙班选手距离终点( )米。

单选题
2022-03-22 22:42
A、30
B、40
C、50
D、60
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正确答案
D

试题解析
由条件可知,甲乙两班选手每步跨出的距离之比为 5:8,相同时间内跨出的步数之比为4:2,则二者的速度之比为(5*4):(8*2)=5:4,即相同时间,甲跑400米时,乙跑了400*(45)=320米,此时乙距离终点400-20-320=60米。故正确答案为D。

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翻译:With Average or With Particular Average(WA or WPA)()
学校运动会4×400米比赛,甲班最后一名选手起跑时,乙班最后一名选手已经跑出20米。已知甲班选手跑8步的路程乙班选手只需要跑5步,但乙班选手跑2步的时间甲班选手能跑4步,则当甲班选手跑到终点时,乙班选手距离终点()米。
学校运动会4×400米比赛,甲班最后一名选手起跑时,乙班最后一名选手已经跑出20米。已知甲班选手跑8步的路程乙班选手只需要跑5步,但乙班选手跑2步的时间甲班选手能跑4步,则当甲班选手跑到终点时,乙班选手距离终点( )米。
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