F.4 math 題=.= 好難唷...

2009-05-29 5:07 am
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...= =?

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


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