F.4 variations & ratio
2010-02-01 12:01 am
For each photo frame of a particular brand, its price $P varies jointly as its length L cm and its width w cm. For photo frame A and photo frame B of this brand, the ratio of their prices is 7:10, and that of their lengths is 4:5. Find the ratio of the width of photo frame A to that of photo frame B.
回答 (1)
2010-02-01 6:26 am
✔ 最佳答案
====================================================圖片參考：http://img688.imageshack.us/img688/7849/57599250.png
2010-01-31 22:26:30 補充：
http://img688.imageshack.us/img688/7849/57599250.png
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https://hk.answers.yahoo.com/question/index?qid=20100131000051KK02921