首页
登录
职称英语
You are trying to fill a bath with both taps on, but have accidentally left out
You are trying to fill a bath with both taps on, but have accidentally left out
游客
2023-10-15
38
管理
问题
You are trying to fill a bath with both taps on, but have accidentally left out the plug. Normally the hot water tap takes 8 minutes to fill the bath and the cold water tap takes 10 minutes. However, the water empties out through the plug hole in 5 minutes. How long will it take for the bath to fill?
选项
答案
40 minutes
解析
(设浴缸容量为x,n为三管一起开的充满水的时间,热水充满浴缸要8分钟,所以每分钟充满x/8,同理冷水每分钟充满x/10,而放水管每分钟放水x/5,故可列方程(x/8+x/10—x/5)×n=x,解得n=40,即需40分钟。)
转载请注明原文地址:https://tihaiku.com/zcyy/3101307.html
相关试题推荐
Surfingissomethingpeopleoftengethookedonaftertryingitafewtimes.
Surfingissomethingpeopleoftengethookedonaftertryingitafewtimes.
Surfingissomethingpeopleoftengethookedonaftertryingitafewtimes.
Iwentaroundsniffingattheotherdoors,tryingtofindoutwherethesmellwa
Surfingissomethingpeopleoftengethookedonaftertryingitafewtimes.
Surfingissomethingpeopleoftengethookedonaftertryingitafewtimes.
Surfingissomethingpeopleoftengethookedonaftertryingitafewtimes.
Surfingissomethingpeopleoftengethookedonaftertryingitafewtimes.
Surfingissomethingpeopleoftengethookedonaftertryingitafewtimes.
Surfingissomethingpeopleoftengethookedonaftertryingitafewtimes.
随机试题
Accordingtotheleadingeconomicmagazine,Cambodiarelies______ontourismtob
Therearemanywhobelievethattheuseofforce______politicalendscanneverb
RupertBrookeRupertBrooke,oneoftheleading
Thehumanbodyisaremarkablefoodprocessor.Asanadult,youmayconsume
WritingaResearchPaperI.ResearchPaperandOrdinary
Whenwethinkofanimalsandplants,wehaveaprettygoodwayofdividingth
A.T8 B.T2 C.T6 D.T4 E.T10高位硬膜外隙麻醉是指穿
A.佝偻病 B.头小畸形 C.脱水 D.颅内压增高 E.服四环素类药物后
下列有关根尖周囊肿的描述,错误的是A.是一种炎症性囊肿 B.纤维囊壁内炎细胞浸
投资项目决策分析与评价的基本要求包括贯彻落实科学发展观、资料数据准确可靠和()
最新回复
(
0
)