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
2024-01-12
46
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/3355650.html
相关试题推荐
Afterworkingfortwentyhourswithoutanyrest,thedoctorswere______.A、exhaus
Youhavefailedtwotests.You’dbetterstartworkingharder,______youwon’tp
ItturnedoutthatthemanwasanexcellentpolicemanworkinginNewYork,_____
Constantshowersarecharacteristic________thesummerhere.A、forB、toC、ofD、wit
Acircularwheeltravelsalongaflatsurfaceataconstantrateof2.5feetper
MachinesXandYrunatdifferentconstantrates,andmachineXcancompleteace
Thesenseofdelayedgratification,ofworkingnowforlaterpleasure,hashelp
ArchaeologistsworkingintheAndesMountainsrecentlyexcavatedaburied4,000-
Themorefrequentlyemployeestaketimetoexerciseduringworkinghourseachwe
f(t)=ktforallt,wherekisaconstant,andf(3)=1/2ColumnA
随机试题
Outof______revenge,hedidhisworsttoblackenhercharacterandrainherre
Shetoldusbrieflyabouthowtheysucceededin______thenewproductA、develop
[originaltext]W:I’msorry,[8]butyouareonthelibrarychecklistM:Whatdoe
ComputerLiteracyTodaywe’lldiscusscomputerliteracy.I.
WhatdoesthespeakerthinkofJohn?[br][originaltext]Somepeopleregretdoin
赛前状态属于( )A.条件反射 B.非条件反射 C.正常反应 D.正常适
A.病原体被清除 B.隐性感染 C.潜伏性感染 D.病原体携带状态 E.
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
应收账款保理的主要意图在于将逾期未能收回的应收账款转让给保理商,从而获取相应的资
在某双代号网络计划中,工作A的最早开始时间为第10天,其持续时间为6天,该工作有
最新回复
(
0
)