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
11
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
Accordingtotheauthor,theaccidentsaremainlycausedby______.[br]People
[audioFiles]audio_eusm_0206(20106)[/audioFiles]A、Traveltothatlibrarytoget
设n位二进制数(从00…0到11…1)中不含连续三位数字相同的数共有F(n)个,
男性,55岁,进行性吞咽困难三个月,体重下降5kg,查无阳性所见首选检查方式是A
庄园经济是一种实现农业资源集聚化、生产规模化、经营多元化、管理企业化、建设生态化
护理伦理学的基本原则不包含A.公正原则 B.行善原则 C.尊重原则 D.不
Thisrestaurant15famousforitsexcell
上海证券交易所可转换债券“债转股”通过()进行。 A.证券交易所交易系统B
A.美托洛尔 B.拉贝洛尔 C.普萘洛尔 D.比索洛尔 E.沙丁胺醇含有
某公司现有生产及维修工人850人,文职人员56人,中层与基层管理人员38人,销售
最新回复
(
0
)