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           ☆1 arithmetic calculations

[1/1 Formula]
    Work: Calculate the value of equation 49.71×π/4*((0.025)^2-(0.02)^2)/(π×0.025×0.0025) .
    Question type: Mathematical calculation
    Solution:
          49.71×π/4*((0.025)^2-(0.02)^2)/(π×0.025×0.0025)
        =49.71×π/4*(0.025^2-(0.02)^2)/(π×0.025×0.0025)
        =49.71×π/4*(0.025^2-0.02^2)/(π×0.025×0.0025)
        =49.71×π/4*0.000225/(π×0.025×0.0025)
        =49.71×π/4*0.000225/0.000196
        =156.168571/4*0.000225/0.000196
        =39.042143*0.000225/0.000196
        =0.008784/0.000196
        =44.816327

    Answer:49.71×π/4*((0.025)^2-(0.02)^2)/(π×0.025×0.0025)=44.816327


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