The time(x min) required to boil a kettle of water varies directly as the volume (V cm^3) of water and inversely as the power(P W) of the stove.It is given that the volumes of two kettles of water are in the ratio 9:13 and the power of the stove used to boil them respectively are in the ratio 12:13.If 9 minutes is required to boil the first kettle of water,find the time required to boil the second kettle.
有人識計嗎...= =?
F.4 math 題=.= 好難唷...
2009-05-29 5:07 am
回答 (1)
2009-05-29 5:23 am
✔ 最佳答案
The answer is as follows:圖片參考：http://i320.photobucket.com/albums/nn347/old-master/090528_4.jpg?t=1243516397
收錄日期: 2021-04-29 18:18:16
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https://hk.answers.yahoo.com/question/index?qid=20090528000051KK01866