数学357

[cloudblade]

数学357

有一栋建筑物
屋顶是个斜坡
其剖面图是90度角的三角形
柱高分别为3米和5米和7米
室内宽度为6米
如图
请问走道宽度和绿地宽度各为多少?

算式
假设
走道宽度为a
绿地宽度为b

算式一
7:3=6+a+b:b
18+3a+3b=7b
3a=4b-18

算式二
5:3=a+b:b
3a+3b=5b
2b=3a

算式三
将算式二的结果导入算式一之中
会得到
b=9
a=6

Comments

[eii]

!BEER

[cloudblade]

!BEER

[beerlover]

^{View or trade BEER.}

Hey @eii, here is a little bit of BEER from @cloudblade for you. Enjoy it!

Learn how to earn FREE BEER each day by staking your BEER.

[beerlover]

^{View or trade BEER.}

Hey @cloudblade, here is a little bit of BEER from @eii for you. Enjoy it!

Learn how to earn FREE BEER each day by staking your BEER.