1 хз
2 27/m2*(m/2+m/9)=27/m2*11/18*m=(сокрощяем)=3/m*11/2=33/m2
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1 хз
2 27/m2*(m/2+m/9)=27/m2*11/18*m=(сокрощяем)=3/m*11/2=33/m2