首页
登录
职称英语
The perimeter of a flat rectangular lawn is 42 meters. The width of the lawn is
The perimeter of a flat rectangular lawn is 42 meters. The width of the lawn is
游客
2025-02-24
18
管理
问题
The perimeter of a flat rectangular lawn is 42 meters. The width of the lawn is 75 percent of its length. What is the area of the lawn, in square meters?
选项
A、40.5
B、96
C、108
D、192
E、432
答案
C
解析
Let s and t be the width and length, in meters, of the lawn, respectively. Then the perimeter is 2s + 2t meters, so that 2s + 2t = 42. Also, the relationship between the width and the length can be translated as s = 0.75t. Substituting 0.75t for 5 in the equation for the perimeter yields 42 = 2(0.75t)+ 2t = 3.5t. So t =
= 12 and s =(0.75)(12)= 9. Since st = 108, the area of the lawn is 108 square meters. The correct answer is Choice C.
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/3970213.html
相关试题推荐
Theperimeterofaflatrectangularlawnis42meters.Thewidthofthelawnis
InparallelogramABCDbelow,findthefollowing.(a)AreaofABCD(b)Perimeterof
InparallelogramABCDbelow,findthefollowing.(a)AreaofABCD(b)Perimeterof
RectangleRhaslength30andwidth10,andsquareShaslength5.Theperimeter
Aflat,rectangularflowerbedwithanareaof2,400squarefeetisborderedby
Fortherectangularsolidbelow,findthefollowing.(a)Surfaceareaofthesoli
Amarchingbandof240musiciansaretomarchinarectangularformationwithm
Theperimeterofarectangleis40.Whatisthegreatestareaoftherectangle?A
Arectangularblockofgoodsisputinarectangularboxof4inchesby6inches
Intherectangularcoordinatesystemabove,forhowmanyofthepointsthatlie
随机试题
RichDiseasesinPoorCountriesNon-communicablediseasesusedtobearich-w
Whatisthemainideaofthepassage?[br][originaltext]Animationmeansma
CT滤波函数中关于软组织模式叙述不正确的是A.是一种平滑、柔和的函数 B.会提
A.意外露髓 B.充填体脱落 C.继发龋 D.乳牙内吸收 E.充填体过高
以下不符合原发性生长激素缺乏症的是()A.身材矮小 B.骨化中心发育正常
某男,60岁、胸痛、咳嗽、咯血痰两个月,胸片见右上肺周边一直径为5cm结节状阴影
未成年人若要实行人工流产手术,有权签署手术同意书的人是A.学校领导 B.患者本
( )针对因火灾、盗窃等意外事件导致的损失提供保险赔偿服务。A.寿险公司 B
人在每一瞬间,将心理活动选择了某些对象而忽略了另一些对象。这一特点指的是注意的(
以下有关FIDIC设计采购施工EPC合同条件,说明正确的是( )。A.项目风险
最新回复
(
0
)