首页
登录
职称英语
Working alone at its constant rate, machine A takes 3 hours to produce a batch o
Working alone at its constant rate, machine A takes 3 hours to produce a batch o
游客
2024-01-12
41
管理
问题
Working alone at its constant rate, machine A takes 3 hours to produce a batch of identical computer parts. Working alone at its constant rate, machine B takes 2 hours to produce an identical batch of parts. How long will it take the two machines, working simultaneously at their respective constant rates, to produce an identical batch of parts?
选项
答案
6/5 hours, or 1 hour 12 minutes
解析
Since machine A takes 3 hours to produce a batch, machine A can produce 1/3 of the batch in 1 hour. Similarly, machine B can produce - of the batch in 1 hour. If we let x represent the number of hours it takes both machines, working simultaneously, to produce the batch, then the two machines will produce - of the job in 1 hour. When the two machines work together, adding their individual production rates, 1/3 and 1/2, gives their combined production rate 1/x. Therefore,
Thus, working together, the machines will take 6/5 hours, or 1 hour 12 minutes, to produce a batch of parts.
转载请注明原文地址:https://tihaiku.com/zcyy/3355427.html
相关试题推荐
Thedoctorkepthim______onalife-supportmachine.A、tidyB、aliveC、gentleD、pro
AfterbeingtestedinmanyWays,thisnewly-designedmachinewill______inthen
Thewholeindustrialprocesswhichmakesmanyofthegoodsandmachineswen
Accordingtothepassage,nonverbalcommunication______.[br]Constantsmiling
Constantshowersarecharacteristic______thesummerhere.A、forB、toC、ofD、wit
-______doyoustudyforatest?-Istudybyworkingwithagroup.A、WhereB、HowC
Rubberdiffersfromplastics______itisproducednaturallyandnotinthelab.
Constantshowersarecharacteristics______thesummerhere.A、forB、toC、withD、o
Afterbeingtestedinmanyways,thisnewly-designedmachinewill______inthe
W:Mywatchisnotworking.______M:It’stenpasttwenty.A、Whattimeisit?B、W
随机试题
Thebiographerhastodancebetweentwoshakypositionswithrespecttothes
AttheuniversityMr.Tangmajoredin[br][originaltext]W:HelloMr.Tang.Tak
金融市场最主要、最基本的功能是()。A.融通货币资金 B.调节经济 C.优
对禽流感病毒检测可用的方法不包括A.培养法分离病毒B.病毒抗原检测C.病毒抗体检
A.(VA=u,vB=0) B.VA=u,vB=u/2 C.(VA=u/2,
因对住宅维修基金的管理使用存在异议,某日众多居民纠结到单位门口讨要说法,面对这种
精子获能发生于( )。A.输精管 B.曲细精管 C.附睾 D.前列腺
下列国家机关中,有权制定地方性法规的有( )。A.省、自治区、直辖市的人民代表大
在医学道德评价中,我们应坚持A.目的与手段的统一论 B.单纯的效果论 C.单
巨幼细胞贫血发病的本质为A、血红蛋白合成障碍 B、能量代谢障碍 C、磷脂代谢
最新回复
(
0
)