首页
登录
职称英语
Three pumps, P, R, and T, working simultaneously at their respective constant ra
Three pumps, P, R, and T, working simultaneously at their respective constant ra
游客
2025-02-24
8
管理
问题
Three pumps, P, R, and T, working simultaneously at their respective constant rates, can fill a tank in 5 hours. Pumps P and R, working simultaneously at their respective constant rates, can fill the tank in 7 hours. How many hours will it take pump T, working alone at its constant rate, to fill the tank?
选项
A、1.7
B、10.0
C、15.0
D、17.5
E、30.0
答案
D
解析
Working simultaneously, pumps P and R fill 1/7 of the tank in 1 hour. Working simultaneously, the three pumps fill 1/5 of the tank in 1 hour. Therefore, working alone, pump T fills
, or 2/35, of the tank in 1 hour. Thus, working alone, pump T takes 35/2 hours, or 17.5 hours, to fill the tank. The correct answer is Choice D.
This explanation uses the following strategies.
Strategy 1: Translate from Words to an Arithmetic or Algebraic Representation
Strategy 8: Search for a Mathematical Relationship
转载请注明原文地址:https://tihaiku.com/zcyy/3970212.html
相关试题推荐
MachineA,workingaloneatitsconstantrate,producesxpoundsofpeanutbutte
Workingaloneatitsconstantrate,machineAproducesklitersofachemicalin
Theequationax2=bx2−1,whereaandbareconstants,hastworealsolutionsQu
Intherectangularcoordinatesystem,aliney=kx+b,wherekandbareconstants
Inthefollowingequation,a,bandceachrepresentsasingledigitrespectivel
Twocubeseachhas6sides,whichrepresents1,2,3,4,5,6respectively.Put
Acircularwheeltravelsalongaflatsurfaceataconstantrateof2.5feetper
ABSTRUSE:A、incognitoB、thoroughC、patentD、respectiveE、apprehensiveC
Thedriverwasexcessively______,constantlyapologizingforthecar’spoorsusp
Therearefewpreciousconstantsinthestoryoftheyen-forastart,itisamon
随机试题
TheUniversityofGeorgia,______in1785,wasthefirststatesupportedUniversi
Britainhasannouncedthatitistocancelabout200millionpounds’wortho
MoststudentshavesomefamiliaritywiththestoriesofFrankensteinandAChris
TheCloningTechnologyI.Thedifference
混凝土表面缺少水泥砂浆而形成石子外露为特征的质量缺陷,即称作()。A.混凝土
患者,女性,48岁,因长期疲乏无力、头晕、眼花而就诊。血常规显示:血红蛋白80g
某住宅工程,建筑面积4800平方米,工程直接费为4056000元,其中人工
下列关于民事行为能力的表述中,不正确的是()。A.6周岁的赵某将其家中价值
家族性息肉病首选的治疗是( )。A.内镜下摘除 B.内镜下圈套电灼切除 C
急性化脓性阑尾炎属于()。 A.变质性炎症 B.浆液性炎症 C.纤维素性炎
最新回复
(
0
)