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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (1.7×25+5.5×55+(X-1.7-5.5)×65)×3.1415×1+1500×3.1415×0.25 ≥2×（136.93+6.4×X） .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 1.7 × 25 + 5.5 × 55 + ( X - 1.7 - 5.5 ) × 65 ) × 3.1415 × 1 + 1500 × 3.1415 × 0.25 ≥2 × ( 136.93 + 6.4 × X )         (1)

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    From inequality(1)：
         X ≥ -2.705354

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    The final solution set is :
         X ≥ -2.705354

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