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
2024-08-11
40
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/10一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/3715249.html
相关试题推荐
Youaretryingtofillabathwithbothtapson,buthaveaccidentallyleftout
Feedbackmatters.Whetherwearetryingtofindourwaytoanewfriend’sh
Feedbackmatters.Whetherwearetryingtofindourwaytoanewfriend’sh
Feedbackmatters.Whetherwearetryingtofindourwaytoanewfriend’sh
Feedbackmatters.Whetherwearetryingtofindourwaytoanewfriend’sh
Feedbackmatters.Whetherwearetryingtofindourwaytoanewfriend’sh
WhatisMalaysia’sEducationMinistrytryingtodo?[originaltext]Theyear2020
He______unwisely,buthewasatleasttryingtodosomethinghelpful.A、mayhave
WhileworkingonacaseDrWatsonaccidentallyfelldowna30ftdrywishingwell
Aspyistryingtosendasecretmessage,we’retryingtodecodehismessage,an
随机试题
Writeashortessaybasedonthepicturebelow.Youshouldstartyouressaywith
Motivationis"thedrivingforcewithinindividualsthatimpelsthemtoacti
Astudyofarthistorymightbeagoodwaytolearnmoreaboutaculturetha
数字报纸最常见的类型是( )。A.封装型数字报纸 B.网络型数字报纸 C.
“意见领袖”这一重要概念来源于A.两级传播论 B.“3S”论 C.把关人理论
在我国西部、北部地区建设大型煤电基地的重要意义包括()。A.方便集中治理,
“二次打击”学说的观点认为第二次打击与第一次相比其作用A、与第一次相同 B、具
药物流行病学常用的研究方法不包括A、描述性研究方法 B、前瞻性队列研究法 C
A.旋光度 B.比旋度 C.旋光现象 D.α-C曲线 E.2.0852平
(2019年真题)不锈钢管壁厚>3mm时,采用的焊接方法()。A.手工电弧
最新回复
(
0
)