Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 3.14*R^2*2.5*1000 >45 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        3.14 * R ^ 2 * 2.5 * 1000 >45         (1)

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    From inequality(1)：
         R < -0.075713 或  R ＞ 0.075713

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    The final solution set is :
         R < -0.075713 或  R ＞ 0.075713

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