Question

帮我解这道应用题，要过程，急！！

water is runnng into an inverted conical reservoir at a rate of πm³ / min. the height of the reservoir is 10 meters and the radius is 5 meters. how fast is the water level rising when the water is 7.5m deep

Answer 1

这道题还需要用到积分的知识，可惜早就忘了。抱歉不能帮助楼主。
我进来只是想说“水龙吟”老兄的答案是不对的。

Answer 2

t=[(1/3)π*5*5*7.5]/π=62.5min