首页
登录
职称英语
[img]ct_gre5image060[/img]The rectangular solid above is made up of eight cubes
[img]ct_gre5image060[/img]The rectangular solid above is made up of eight cubes
游客
2025-02-24
45
管理
问题
The rectangular solid above is made up of eight cubes of the same size, each of which has exactly one face painted blue. What is the greatest fraction of the total surface area of the solid that could be blue?
选项
A、1/6
B、3/14
C、1/4
D、2/7
E、1/3
答案
D
解析
上图所示的长方体由8块同样大小的立方体构成,每个立方体仅有一个面被涂成蓝色。问该长方体的表面是蓝色的部分占其总表面积的最大比例是多少?
解:本题的正确答案为(D)。蓝色部分占表面最大比例的情况是8个立方体的蓝色表面均露在外面,共有8个平方单位,而长方体的表面共有28个平方单位,因而蓝色部分占长方体表面积的最大比值为8/28=2/7。
转载请注明原文地址:http://tihaiku.com/zcyy/3971329.html
相关试题推荐
Inarectangularcoordinatesystem,linekhasx-intercept4andslope-2.Colum
Arectangulartabletopconsistsofapieceoflaminatedwoodborderedbyathin
[img]ct_gre5image082[/img]Intherectangularcoordinatesystemabove,forhowm
[img]ct_gre5image060[/img]Therectangularsolidaboveismadeupofeightcubes
Iftheareasofthreeofthefacesofarectangularsolidare6,10,and15,what
Arectangularfloorwithanareaof12squaremetersisdrawntoscalewith2ce
[img]ct_gre5image048[/img]Therectangularboxshownabovehasbeenwrappedwith
[img]ct_gre5image046[/img]Intherectangularcoordinatesystemabove,thecoord
Arectangularfloor18feetby10feetistobecompletelycoveredwithcarpetin
Whatisthesurfaceareaofarightrectangularsolidwithdimensions4by7by
随机试题
FORESTALL:A、extendB、precipitateC、vacillateD、proclaimE、stabilizeB
Anewhigh-performancecontactlensunderdevelopmentatthedepartmentfor
[audioFiles]2018m1x/audio_eylhm_25_180128[/audioFiles]A、TheUSjudicialsystem
Parentscaneasilycomedownwithanacutecaseofschizophrenia(精神分裂症)from
消费函数
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
下列各项中,不属于小儿体格生长发育规律的是A.由上到下 B.由远到近 C.由
A.持续低热,手足蠕动,舌红少苔B.突然昏仆,半身不遂,口眼歪斜C.两目上视,角
一箱子内有2个黄球和2个红球,每次从中随机取出一个球,然后放入2个黄球,则第四次
A.青霉素 B.红霉素 C.庆大霉素 D.耐青霉素酶的β-内酰胺类抗生素
最新回复
(
0
)