首页
登录
职称英语
In the first 2 hours after Meadow’s self-service laundry opens, m large washing
In the first 2 hours after Meadow’s self-service laundry opens, m large washing
游客
2025-02-27
33
管理
问题
In the first 2 hours after Meadow’s self-service laundry opens, m large washing machines and n small washing machines are in continual use. Including the time for filling and emptying the washing machines, each load of laundry takes 30 minutes in a large washing machine and 20 minutes in a small washing machine. What is the total number of loads of laundry done at Meadow’s self-service laundry during this 2-hour period?
(1) n = 3m
(2) 2m + 3n = 55
选项
A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.
答案
B
解析
During the two-hour period each large washer does four loads (the number of 30-minute periods in two hours is four) and each small washer does six loads (the number of 20-minute periods in two hours is six).Therefore, the total number of loads done during the two-hour period by m large washers and n small washers is Am + 6n.
(1) If m = l and n = 3, then n = 3m and the total number of loads of laundry done in the two-hour period is 4(1) + 6(3) = 22. However, if m = 2 and n = 6, then n = 3m and the total number of loads of laundry done in the two-hour period is 4(2) + 6(6) = 44; NOT sufficient.
(2) Since 2m + 3n = 55, it follows that 4m + 6n = 110. Therefore, by the remarks above, the total number of loads done during the two-hour period is 110; SUFFICIENT.
The correct answer is B;
statement 2 alone is sufficient.
转载请注明原文地址:https://tihaiku.com/zcyy/3974736.html
相关试题推荐
Inthefirst2hoursafterMeadow’sself-servicelaundryopens,mlargewashing
InMarch300collegestudentsturnedoutinWashingtontoprotestagainstpropos
TheLincolnMemorial,locatedontheNationalMallinWashington,D.C.,is
TheLincolnMemorial,locatedontheNationalMallinWashington,D.C.,is
TheLincolnMemorial,locatedontheNationalMallinWashington,D.C.,is
TheLincolnMemorial,locatedontheNationalMallinWashington,D.C.,is
Asanarchitectwhorehabilitatesolderbuildings,RobertaWashingtonobjected
随机试题
Somepeoplesaythatolderpeopleshouldlivewiththeiradultchildren.Oth
Islamisacompletewayoflife.Itconsidersthefamilythecornerstoneof
Thebesttitleforthispassagewouldbe______.[br]Whichpartofdancingocc
唯心主义的一元论主张世界万物的本原是()A.精神 B.某种实物 C.原初的
上市公司就并购重组事项出具盈利预测报告的,在相关并购重组活动完成后,凡不属于上市
住房抵押贷款是指贷款银行向贷款者提供大部分购房款项,购房者以稳定的收入分期向银行
宜居带是指一颗恒星周围一定距离的范围,在这一范围内水可以以液态形式存在。由于液态
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
某建筑设有自动喷水灭火系统、火灾自动报警系统、防排烟系统等,使消防联动控制器处于
根据我国工业企业划分标准,大中型企业是指()。A.中一型及以上规模的企业 B.
最新回复
(
0
)