题目
英语翻译
A developer has land that has x feet of lake frontage.The land is to be subdivided into lots,each of which is to have either 80 feet or 100 feet of lake frontage.If 1/9 of the lots are to have 80 feet of frontage each and the remain 40 lots are to have 100 feet of frontage each,what is the value of
(A)400 (B)3200 (C)3700 (D)4400 (E)4760
A developer has land that has x feet of lake frontage.The land is to be subdivided into lots,each of which is to have either 80 feet or 100 feet of lake frontage.If 1/9 of the lots are to have 80 feet of frontage each and the remain 40 lots are to have 100 feet of frontage each,what is the value of
(A)400 (B)3200 (C)3700 (D)4400 (E)4760
提问时间：2020-11-09
答案
一个发展商有一块临河的土地长X feet.这块土地要被分割成小块,每一小块长80 或100 feet.如果1/9的小块土地长80,剩余的40小块土地长100,问X为多少.
假设一共分成n块土地,(1-1/9)n=40,so n=45,80*5+100*40=4400.
D
假设一共分成n块土地,(1-1/9)n=40,so n=45,80*5+100*40=4400.
D
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