Description: A Cup of section IV of Baidu answer questions. The problem of glass! To solve this problem, you should know that the volume of one cup is pi* (r* r+ R* R+ r* R)* h/3. If you don' t know this formula, you could find by this formula : s* h/3. It' s the formula to calculte the volume of taper. The next step after you know the formula is to calculate the high of the water.
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cup.cpp