首页
登录
职称英语
The traffic light changes color in the order of Green-Yellow-Red, and the time d
The traffic light changes color in the order of Green-Yellow-Red, and the time d
游客
2024-01-13
61
管理
问题
The traffic light changes color in the order of Green-Yellow-Red, and the time duration for each color is 45s, 5s, 40s respectively. How many seconds at most can the red light appear in a period of 5 minutes?
选项
A、150s
B、120s
C、180s
D、160s
E、100s
答案
A
解析
一共5分钟即300秒,Green-Yellow-Red按照顺序亮一次需要45+5+40=90秒,要使红灯在这个300秒间隔内出现时间最长,那么这300秒间隔可以从红灯开始亮算起,这样经过40秒红灯后,余下260秒再开始Green-Yellow-Red循环,一个循环需要90秒,那么只能做两个循环,剩下260-90×2=80秒,按照Green-Yellow-Red顺序亮,绿灯亮去掉45秒。黄灯亮去掉5秒,还剩下80-45-5=30秒红灯亮。
那么在这300秒内,红灯最大一共亮40+40×2+30=150秒。
转载请注明原文地址:https://tihaiku.com/zcyy/3360229.html
相关试题推荐
______thetrafficjam,wewouldhavecaughtourtrain.A、ButforB、BecauseofC、B
Whenthelightsturnred,thetraffic________stop.A、canB、mayC、mustD、needC句意:
ThetrafficlightchangescolorintheorderofGreen-Yellow-Red,andthetimed
Chris:Hundredsoftrafficaccidentsannuallyareattributabletothepoorcondi
Anoverlycentralizedeconomy,notthechangesintheclimate,isresponsiblefo
Althoughcompactcarsmakeuponly38percentofthevehiclesintraffic,48per
Therearefundamentallytwopossiblechangesinaneconomythatwilleachcause
BecauseHalley’scometchangesorbitslightlyduringtheseventy-six-yearinterv
Thegrowingdemandforhousing,trafficcongestion,andlongercommutingtripsh
AccordingtoscientistsattheUniversityofCalifornia,thepatternofchanges
随机试题
ReadthearticlebelowaboutasupermarketchainintheUK.Aresentences16-22
ConversationalSkillsPeoplewhousuallymakeusfee
Althoughateenager,Tomcouldresist(tell)______whattodoandwhatnottod
Ingeneral,oursocietyisbecomingoneofgiantenterprisesdirectedbyab
下列有关炭疽的叙述错误的是A.炭疽的传染源是病畜和病人 B.炭疽杆菌只通过与破
关于方差与标准差,下面说法错误的是()。A.标准差和方差都可以表示投资回报的风
A.印尼B.云南C.海南D.广东E.江西、四川、湖北等药材枳壳主产于
抗利尿激素生成的部位是A、肾近球细胞 B、腺垂体 C、神经垂体 D、髓袢
下列选项中,不影响担任股份有限公司的董事、监事和高级管理人员的是()。A:因犯罪
关于控制性详细规划的表述,下列哪项是不准确的?A.属于法定性规划 B.综合指标
最新回复
(
0
)