MATHS題!!
2008-08-10 8:02 am
一隻老鼠從A點沿長方形的邊向東面奔跑，一隻花貓同時向從A點沿長方形的邊向南跑去，結果在C點迪遇上老鼠，其中BC=60cm已知老鼠的速率是花貓速率的11/14，問長方形的周界長多少m?
回答 (2)
2008-08-10 7:02 pm
✔ 最佳答案
我冇估錯的話，你呢條係Oxford/Canotta Maths
Summer Exercise (F.1-F.2)
Chapter 1 Exercise
第 24 條，係咪？
以下係我自己的做法：
Let x cm be the length from A to B.
because 1m=100cm
∴ 60 cm = 0.6 m
11/14( x 0.6 ) = x - 0.6
11( x 0.6) = 14 ( x - 0.6 )
11x 6.6 = 14x - 8.4
-3x = -15
x = 5
because the length from A to B is 5 cm,
∴ The perimeter of the rectangle is 5 x 2 cm = 10 cm
參考: myself
2008-08-10 8:54 am
請問B是甚麼？
收錄日期: 2021-04-29 18:16:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080810000051KK00002