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
34
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
Listentothefollowingpassage.Altogetherthepassagewillbereadtoyou
Thefirsthotelswerebuilt______.[br]Motelsareusually______.A、large,high
[originaltext]W:Jack,sitdownandlisten.Thisisimportant.(9)We’llhavet
()是可以消除的。A.系统误差 B.随机误差 C.过失误差 D.偶然
股指期货无套利区间的上下界幅宽主要由交易费用、市场冲击成本和借贷利率差成本所决定
(2019年真题)财务公司对成员单位办理财务和融资顾问,主要是为成员单位的()
大黄药材组织中的黏液腔存在于A:皮层B:韧皮部C:木栓层D:木质部E:髓
润肠通便剂主治A.邪热蕴结于肠胃所致的大便秘结 B.饮食积滞证 C.脾肾亏损
(2018年真题)某商业银行2015年度的关注类贷款为100亿元,次级类贷款为2
最新回复
(
0
)