首页
登录
职称英语
[img]2014m9x/ct_egreqj_egreqjs_0027_20148[/img]The figure above represents a re
[img]2014m9x/ct_egreqj_egreqjs_0027_20148[/img]The figure above represents a re
游客
2024-01-12
49
管理
问题
The figure above represents a rectangular garden with a walkway around it. The garden is 18 feet long and 12 feet wide. The walkway is uniformly 3 feet wide, and its edges meet at right angles. What is the area of the walkway?
______square feet
选项
答案
216
解析
You can see from the figure that the shaded region is the region between the two rectangles. Looking at the shaded region in this way suggests that the area of the walkway can be calculated as the difference between the area of the larger rectangle and the area of the smaller rectangle.
The region represented by the smaller rectangle is the garden. Since the garden is 18 feet long and 12 feet wide, its area is(18)(12), or 216 square feet.
The region represented by the larger rectangle is the garden and the walkway combined. The length of the region is the length of the garden plus twice the width of the walkway, or 18 +(2)(3)= 24 feet. The width of the region is the width of the garden plus twice the width of the walkway, or 12 +(2)(3)= 18 feet. Therefore, the area of the region represented by the larger rectangle is(24)(18), or 432 square feet, and the area of the walkway is 432 — 216, or 216 square feet.
Another way to approach this problem is to think of the walkway as being composed of four rectangles and four squares, as shown in the figure below.
Each of the four squares is 3 feet long and 3 feet wide. The two rectangles running along the length of the garden are 18 feet long and 3 feet wide, and the two rectangles running along the width of the garden are 12 feet long and 3 feet wide. Thus, the area of the walkway is
4(3)(3)+ 2(18)(3)+ 2(12)(3)= 36 + 108 + 72 = 216 square feet
The correct answer is 216.
转载请注明原文地址:https://tihaiku.com/zcyy/3355856.html
相关试题推荐
Itisnoteasy______theanswertothedifficultmathproblem.A、tofigureoutB
Justasthelionrepresentsstrength,thepigeonis______peaceingeneralcase
Itmakes______tofigureoutthesituationbeforetakinganyaction.A、senseB、mea
Intherectangularfigureabove,theareaoftheshadedregionisequaltothea
Whichofthefollowingcouldbetheequationoflinelinthefigureabove?[img]
Whatistheareaoftheshadedfigure?[img]2011q3/ct_egmatqj_egmatqchoose_0056_2
Twocubeseachhas6sides,whichrepresents1,2,3,4,5,6respectively.Put
[img]2022m10x/ct_ve01204002j_0014_221018[/img]Thefigureaboverepresentsanet
[img]2022m10x/ct_ve01204002j_0003_221018[/img]Thefiguresaboveshowahexagona
[img]2022m10x/ct_ve01204002j_0057_221018[/img]Thefigureaboveshowsthedimens
随机试题
[originaltext]Moneyfrommigrantworkersnowexceedsthecombinedtotalofall
在Excel2010公式功能区的()子功能区中,提供了数学、财务、工程等专
两条曲线分别表示氢、氧两种气体在相同温度T时分子按速率的分布,其中:曲线1、2分
风险溢价是为()投资者购买风险资产而向他们提供的一种额外的期望收益率。A、风险
火车站点A和B与初始发车站C的直线距离都等于akm,站点A在发车站C的北偏东20
2019年5月,全国12358价格监管平台受理价格举报、投诉、咨询共计37576
某机关要从赵一、钱二、孙三、李四、周五、吴六等六位同志中选拔三位同志组成团队出国
在行政程序的划分中,根据行政程序的环节可划分为( )。A.普通行政程序 B.
在灌注桩施工遇有施工深度内存在较高水头的承压力时,不宜选取下列哪种施工工艺?(
腹膜炎患者应进行手术探查的情况是( )。A.体温超过38℃ B.年龄超过60
最新回复
(
0
)